{ "catalogueVersion": "uniruler-preview-2026-10-19-r3", "preparedOn": "2026-10-19", "scope": "Defined length references, not universal physical averages. Preserve dimensions, qualifications and source attribution.", "references": [ { "id": "mm", "label": "Millimetre", "shortLabel": "mm", "category": "metric", "metres": "0.001", "evidenceKind": "exact_unit_definition", "fictional": false, "dimension": "length", "axis": "length", "description": "Exactly 0.001 metres per millimetre.", "sourceIds": [ "nist_length" ], "quantity": "length", "sourceValue": "1", "sourceUnit": "mm", "referenceRevision": "1" }, { "id": "cm", "label": "Centimetre", "shortLabel": "cm", "category": "metric", "metres": "0.01", "evidenceKind": "exact_unit_definition", "fictional": false, "dimension": "length", "axis": "length", "description": "Exactly 0.01 metres per centimetre.", "sourceIds": [ "nist_length" ], "quantity": "length", "sourceValue": "1", "sourceUnit": "cm", "referenceRevision": "1" }, { "id": "m", "label": "Metre", "shortLabel": "m", "category": "metric", "metres": "1", "evidenceKind": "exact_unit_definition", "fictional": false, "dimension": "length", "axis": "length", "description": "Exactly 1 metres per metre.", "sourceIds": [ "nist_length" ], "quantity": "length", "sourceValue": "1", "sourceUnit": "m", "referenceRevision": "1" }, { "id": "km", "label": "Kilometre", "shortLabel": "km", "category": "metric", "metres": "1000", "evidenceKind": "exact_unit_definition", "fictional": false, "dimension": "length", "axis": "length", "description": "Exactly 1000 metres per kilometre.", "sourceIds": [ "nist_length" ], "quantity": "length", "sourceValue": "1", "sourceUnit": "km", "referenceRevision": "1" }, { "id": "in", "label": "Inch", "shortLabel": "in", "category": "us_customary_imperial", "metres": "0.0254", "evidenceKind": "exact_unit_definition", "fictional": false, "dimension": "length", "axis": "length", "description": "Exactly 0.0254 metres per inch.", "sourceIds": [ "nist_length" ], "quantity": "length", "sourceValue": "1", "sourceUnit": "in", "referenceRevision": "1" }, { "id": "ft", "label": "Foot (international)", "shortLabel": "ft", "category": "us_customary_imperial", "metres": "0.3048", "evidenceKind": "exact_unit_definition", "fictional": false, "dimension": "length", "axis": "length", "description": "Exactly 0.3048 metres per international foot.", "sourceIds": [ "nist_foot" ], "quantity": "length", "sourceValue": "1", "sourceUnit": "ft", "referenceRevision": "1" }, { "id": "yd", "label": "Yard", "shortLabel": "yd", "category": "us_customary_imperial", "metres": "0.9144", "evidenceKind": "exact_unit_definition", "fictional": false, "dimension": "length", "axis": "length", "description": "Exactly 0.9144 metres per yard.", "sourceIds": [ "nist_length" ], "quantity": "length", "sourceValue": "1", "sourceUnit": "yd", "referenceRevision": "1" }, { "id": "mi", "label": "Mile (international)", "shortLabel": "mi", "category": "us_customary_imperial", "metres": "1609.344", "evidenceKind": "exact_unit_definition", "fictional": false, "dimension": "length", "axis": "length", "description": "Exactly 1609.344 metres per international mile.", "sourceIds": [ "nist_foot" ], "quantity": "length", "sourceValue": "1", "sourceUnit": "mi", "referenceRevision": "1" }, { "id": "id1-card-long-edge", "label": "ID-1 size card", "shortLabel": "card lengths", "category": "everyday_objects", "metres": "0.08560", "evidenceKind": "standard_nominal", "fictional": false, "dimension": "long edge", "axis": "long_edge", "description": "Nominal long edge; excludes assumptions about manufacturing tolerances or card thickness.", "sourceIds": [ "icao_card" ], "quantity": "length", "sourceValue": "85.60", "sourceUnit": "mm", "referenceRevision": "1" }, { "id": "a4-paper-long-edge", "label": "A4 paper", "shortLabel": "A4 lengths", "category": "everyday_objects", "metres": "0.297", "evidenceKind": "standard_nominal", "fictional": false, "dimension": "long edge", "axis": "long_edge", "description": "Nominal long edge of an A4 sheet; thickness and paper weight are not part of this reference.", "sourceIds": [ "epson_paper" ], "quantity": "length", "sourceValue": "297", "sourceUnit": "mm", "referenceRevision": "1" }, { "id": "us-quarter-diameter", "label": "US circulating quarter", "shortLabel": "quarter diameters", "category": "coins", "metres": "0.02426", "evidenceKind": "manufacturer_nominal", "fictional": false, "dimension": "diameter", "axis": "diameter", "description": "Mint-published diameter. Use the metric basis rather than recombining rounded displayed inch values.", "sourceIds": [ "mint_quarter" ], "quantity": "length", "sourceValue": "24.26", "sourceUnit": "mm", "referenceRevision": "1" }, { "id": "table-tennis-ball-2025-diameter", "label": "Table tennis ball — 2025 rules", "shortLabel": "ball diameters", "category": "sports", "metres": "0.040", "evidenceKind": "standard_nominal", "fictional": false, "dimension": "diameter", "axis": "diameter", "description": "2025 regulation specification; not a claim about every manufactured ball or a reviewed 2026 edition.", "sourceIds": [ "ittf_2025" ], "quantity": "length", "sourceValue": "40", "sourceUnit": "mm", "referenceRevision": "1" }, { "id": "table-tennis-table-2025-length", "label": "Table tennis table — 2025 rules", "shortLabel": "table lengths", "category": "sports", "metres": "2.74", "evidenceKind": "standard_nominal", "fictional": false, "dimension": "playing-surface length", "axis": "playing_surface_length", "description": "2025 regulation playing-surface length; does not include frame or surrounding playing area.", "sourceIds": [ "ittf_2025" ], "quantity": "length", "sourceValue": "2.74", "sourceUnit": "m", "referenceRevision": "1" }, { "id": "klein-613-3-overall-length", "label": "Klein 613-3 screwdriver", "shortLabel": "screwdriver lengths", "category": "tools", "metres": "0.1651", "evidenceKind": "manufacturer_nominal", "fictional": false, "dimension": "overall length", "axis": "overall_length", "description": "Overall tool length, not its separately specified shank length.", "sourceIds": [ "klein_613_3" ], "quantity": "length", "sourceValue": "6.5", "sourceUnit": "in", "referenceRevision": "1", "variant": "613-3, #0 Phillips" }, { "id": "lego-75192-model-length", "label": "LEGO Millennium Falcon 75192", "shortLabel": "LEGO Falcon lengths", "category": "toys", "metres": "0.84", "evidenceKind": "manufacturer_rounded_reference", "fictional": false, "dimension": "assembled model length", "axis": "assembled_model_length", "description": "Rounded assembled physical toy-model length. Not the fictional full-size ship. Source phrasing does not establish a precise tolerance; other axes are not approved here.", "sourceIds": [ "lego_75192" ], "quantity": "length", "sourceValue": "84", "sourceUnit": "cm", "referenceRevision": "1", "variant": "Set 75192" }, { "id": "boeing-747-8-wingspan", "label": "Boeing 747-8 Intercontinental", "shortLabel": "747-8 wingspans", "category": "aircraft", "metres": "68.4", "evidenceKind": "manufacturer_rounded_reference", "fictional": false, "dimension": "full tip-to-tip wingspan", "axis": "full_wingspan", "description": "Tip-to-tip wingspan. Do not relabel as one wing’s structural length or substitute another 747 variant.", "sourceIds": [ "boeing_747_8" ], "quantity": "length", "sourceValue": "68.4", "sourceUnit": "m", "referenceRevision": "1", "variant": "747-8 Intercontinental" }, { "id": "prairie-sensation-apple-diameter", "label": "Prairie Sensation apple", "shortLabel": "apple diameters", "category": "fruits", "metres": "0.0763", "evidenceKind": "sample_mean", "fictional": false, "dimension": "diameter", "axis": "diameter", "description": "Mean diameter of 10 fruit; sampling date unstated. Not a worldwide apple average.", "sourceIds": [ "usask_apple" ], "quantity": "length", "sourceValue": "7.63", "sourceUnit": "cm", "referenceRevision": "1", "variant": "Prairie Sensation cultivar", "range": { "lowMetres": "0.073", "highMetres": "0.086", "meaning": "Reported cultivar size range; relationship to the 10-fruit sample unspecified; not a confidence interval." }, "sampleCount": 10, "samplingDate": null }, { "id": "pikachu-ordinary-height", "label": "Pikachu — ordinary form", "shortLabel": "Pikachu heights", "category": "fiction", "metres": "0.4", "evidenceKind": "official_fictional_reference", "fictional": true, "dimension": "official Pokédex height", "axis": "official_pokedex_height", "description": "Official fictional height. Not a real animal measurement; excludes Gigantamax.", "sourceIds": [ "pokemon_pikachu" ], "quantity": "length", "sourceValue": "0.4", "sourceUnit": "m", "referenceRevision": "1", "variant": "Pokédex No.0025, ordinary form" }, { "id": "nantes-carrot-root-length", "label": "Nantes-type carrot", "shortLabel": "carrot root lengths", "category": "vegetables", "metres": "0.1651", "evidenceKind": "editorial_range_midpoint", "fictional": false, "dimension": "root length, without foliage", "axis": "root_length", "description": "Chosen midpoint for scalar comparisons, not a measured mean; excludes foliage.", "sourceIds": [ "umd_carrot" ], "quantity": "length", "sourceValue": "6.5", "sourceUnit": "in", "referenceRevision": "1", "variant": "Nantes types", "range": { "sourceLow": "6", "sourceHigh": "7", "sourceUnit": "in", "lowMetres": "0.1524", "highMetres": "0.1778", "meaning": "Documented type-level root-length range; no sample count or sampling date stated." } }, { "id": "victorinox-spartan-13603t-listed-length", "label": "Victorinox Spartan pocket knife", "shortLabel": "Spartan knife lengths", "category": "tools", "metres": "0.091", "evidenceKind": "manufacturer_nominal", "fictional": false, "dimension": "manufacturer's listed length", "axis": "manufacturer_listed_length", "description": "Uses the product page's Length specification for item 1.3603.T. Do not reinterpret this value as the blade length or the reach of unfolded implements.", "sourceIds": [ "victorinox_spartan" ], "quantity": "length", "sourceValue": "91", "sourceUnit": "mm", "referenceRevision": "1", "variant": "Item 1.3603.T, red transparent" }, { "id": "nintendo-switch-oled-heg001-width", "label": "Nintendo Switch OLED model", "shortLabel": "Switch OLED widths", "category": "electronics", "metres": "0.242", "evidenceKind": "manufacturer_nominal", "fictional": false, "dimension": "overall width, with controllers", "axis": "overall_width", "description": "Width of the HEG-001 console with the Joy-Con controllers attached; it is not the display diagonal or the width of the console alone.", "sourceIds": [ "nintendo" ], "quantity": "length", "sourceValue": "242", "sourceUnit": "mm", "referenceRevision": "1", "variant": "HEG-001 console with Joy-Con controllers attached" }, { "id": "airpods-pro2-usbc-case-width", "label": "AirPods Pro 2 USB-C charging case", "shortLabel": "AirPods case widths", "category": "electronics", "metres": "0.0606", "evidenceKind": "manufacturer_nominal", "fictional": false, "dimension": "case width", "axis": "case_width", "description": "Width of the USB-C charging case supplied with the 2023 AirPods Pro 2 model. Uses Apple's metric figure directly; Apple notes that size varies with configuration and manufacturing.", "sourceIds": [ "apple_airpods_case" ], "quantity": "length", "sourceValue": "60.6", "sourceUnit": "mm", "referenceRevision": "1", "variant": "MagSafe Charging Case (USB-C), introduced 2023" }, { "id": "webb-primary-mirror-diameter", "label": "James Webb Space Telescope primary mirror", "shortLabel": "Webb mirror diameters", "category": "science", "metres": "6.5", "evidenceKind": "published_approximation", "fictional": false, "dimension": "primary-mirror diameter", "axis": "primary_mirror_diameter", "description": "NASA's approximate diameter across the primary mirror. This is a linear span, not the collecting area or a single mirror segment's size.", "sourceIds": [ "nasa_webb" ], "quantity": "length", "sourceValue": "6.5", "sourceUnit": "m", "referenceRevision": "1", "variant": "Deployed primary-mirror assembly" }, { "id": "curiosity-rover-length", "label": "Curiosity Mars rover", "shortLabel": "Curiosity rover lengths", "category": "spacecraft", "metres": "3", "evidenceKind": "published_approximation", "fictional": false, "dimension": "vehicle length, without extended arm", "axis": "vehicle_length_excluding_arm_extension", "description": "NASA's approximate rover length, excluding the additional reach of the arm when extended forward. Uses the published 3 m reference rather than converting the rounded 10 ft counterpart.", "sourceIds": [ "nasa_curiosity" ], "quantity": "length", "sourceValue": "3", "sourceUnit": "m", "referenceRevision": "1", "variant": "Mars Science Laboratory rover" }, { "id": "airbus-a380-overall-length", "label": "Airbus A380", "shortLabel": "A380 lengths", "category": "aircraft", "metres": "72.7", "evidenceKind": "manufacturer_rounded_reference", "fictional": false, "dimension": "overall length", "axis": "overall_length", "description": "Overall aircraft length as presented in Airbus's February 2022 factsheet. The one-decimal figure is a published reference, not an assertion of millimetre precision.", "sourceIds": [ "airbus_a380" ], "quantity": "length", "sourceValue": "72.7", "sourceUnit": "m", "referenceRevision": "1", "variant": "A380, February 2022 manufacturer factsheet" }, { "id": "mcc-standard-cricket-pitch-length", "label": "Standard cricket pitch", "shortLabel": "cricket pitch lengths", "category": "sports", "metres": "20.1168", "evidenceKind": "standard_nominal", "fictional": false, "dimension": "pitch length", "axis": "pitch_length", "description": "Nominal length between the bowling creases under MCC Law 6.1. Uses the law's 22-yard figure and the exact international-yard conversion; the law displays a rounded 20.12 m counterpart. Junior-cricket lengths can differ.", "sourceIds": [ "mcc_pitch" ], "quantity": "length", "sourceValue": "22", "sourceUnit": "yd", "referenceRevision": "1", "variant": "MCC Law 6.1 standard pitch; junior-cricket variations excluded" }, { "id": "elizabeth-tower-clock-dial-diameter", "label": "Elizabeth Tower clock dial", "shortLabel": "clock-dial diameters", "category": "landmarks", "metres": "7", "evidenceKind": "published_approximation", "fictional": false, "dimension": "clock-dial diameter", "axis": "dial_diameter", "description": "The owner's published diameter of one clock dial, commonly associated with Big Ben. It is not the size of the Great Bell or the height of Elizabeth Tower.", "sourceIds": [ "parliament_clock" ], "quantity": "length", "sourceValue": "7", "sourceUnit": "m", "referenceRevision": "1", "variant": "One Great Clock dial at the Palace of Westminster" }, { "id": "ingenuity-mars-helicopter-rotor-span", "label": "Ingenuity Mars Helicopter", "shortLabel": "Ingenuity rotor spans", "category": "spacecraft", "metres": "1.2", "evidenceKind": "published_approximation", "fictional": false, "dimension": "rotor tip-to-tip span", "axis": "rotor_tip_to_tip_span", "description": "NASA's approximate tip-to-tip rotor span. It is not the length of an individual blade, the sum of both rotor spans, or a measurement of the damaged aircraft after its final flight.", "sourceIds": [ "nasa_ingenuity" ], "quantity": "length", "sourceValue": "1.2", "sourceUnit": "m", "referenceRevision": "1", "variant": "Original design specification" }, { "id": "monarch-butterfly-adult-wingspan-midpoint", "label": "Adult monarch butterfly", "shortLabel": "monarch wingspans", "category": "animals", "metres": "0.0889", "evidenceKind": "editorial_range_midpoint", "fictional": false, "dimension": "wingspan", "axis": "wingspan", "description": "An editorial midpoint of the FWS 3-to-4-inch adult wingspan range, used for scalar comparisons. It is not a measured population average; individuals and populations vary.", "sourceIds": [ "fws_monarch" ], "quantity": "length", "sourceValue": "3.5", "sourceUnit": "in", "referenceRevision": "1", "variant": "Danaus plexippus adult; species-account reference", "range": { "sourceLow": "3", "sourceHigh": "4", "sourceUnit": "in", "lowMetres": "0.0762", "highMetres": "0.1016", "meaning": "Published adult wingspan range. No sample count, sampling date, or probability distribution is stated for this range; the page's 7-to-10-cm counterpart is rounded." } }, { "id": "us-penny-diameter", "label": "US penny", "shortLabel": "penny", "category": "coins", "metres": "0.019050", "evidenceKind": "standard_nominal", "fictional": false, "dimension": "diameter", "axis": "diameter", "description": "Nominal diameter in the 2024 U.S. Code specification. Individual minted or worn coins can vary.", "sourceIds": [ "gpo_coin_diameters_2024" ], "quantity": "length", "sourceValue": "0.75", "sourceUnit": "in", "referenceRevision": "1", "variant": "2024 statutory diameter specification; historical large coins excluded" }, { "id": "us-nickel-diameter", "label": "US nickel", "shortLabel": "nickel", "category": "coins", "metres": "0.0212090", "evidenceKind": "standard_nominal", "fictional": false, "dimension": "diameter", "axis": "diameter", "description": "Nominal diameter in the 2024 U.S. Code specification. Individual minted or worn coins can vary.", "sourceIds": [ "gpo_coin_diameters_2024" ], "quantity": "length", "sourceValue": "0.835", "sourceUnit": "in", "referenceRevision": "1", "variant": "2024 statutory diameter specification; historical large coins excluded" }, { "id": "us-dime-diameter", "label": "US dime", "shortLabel": "dime", "category": "coins", "metres": "0.0179070", "evidenceKind": "standard_nominal", "fictional": false, "dimension": "diameter", "axis": "diameter", "description": "Nominal diameter in the 2024 U.S. Code specification. Individual minted or worn coins can vary.", "sourceIds": [ "gpo_coin_diameters_2024" ], "quantity": "length", "sourceValue": "0.705", "sourceUnit": "in", "referenceRevision": "1", "variant": "2024 statutory diameter specification; historical large coins excluded" }, { "id": "us-half-dollar-diameter", "label": "US half dollar", "shortLabel": "half dollar", "category": "coins", "metres": "0.0306070", "evidenceKind": "standard_nominal", "fictional": false, "dimension": "diameter", "axis": "diameter", "description": "Nominal diameter in the 2024 U.S. Code specification. Individual minted or worn coins can vary.", "sourceIds": [ "gpo_coin_diameters_2024" ], "quantity": "length", "sourceValue": "1.205", "sourceUnit": "in", "referenceRevision": "1", "variant": "2024 statutory diameter specification; historical large coins excluded" }, { "id": "us-small-dollar-diameter", "label": "US small dollar coin", "shortLabel": "US dollar coin", "category": "coins", "metres": "0.0264922", "evidenceKind": "standard_nominal", "fictional": false, "dimension": "diameter", "axis": "diameter", "description": "Nominal diameter in the 2024 U.S. Code specification. Individual minted or worn coins can vary.", "sourceIds": [ "gpo_coin_diameters_2024" ], "quantity": "length", "sourceValue": "1.043", "sourceUnit": "in", "referenceRevision": "1", "variant": "2024 statutory diameter specification; historical large coins excluded" }, { "id": "one-euro-coin-diameter", "label": "One-euro coin", "shortLabel": "€1 coin", "category": "coins", "metres": "0.02325", "evidenceKind": "standard_nominal", "fictional": false, "dimension": "diameter", "axis": "diameter", "description": "Nominal diameter of the standard €1 circulation coin, independent of its national-side design.", "sourceIds": [ "ec_euro_coin_specs" ], "quantity": "length", "sourceValue": "23.25", "sourceUnit": "mm", "referenceRevision": "1" }, { "id": "us-small-size-banknote-long-edge", "label": "US small-size banknote", "shortLabel": "US banknote", "category": "everyday_objects", "metres": "0.155956", "evidenceKind": "published_approximation", "fictional": false, "dimension": "long edge", "axis": "long_edge", "description": "Uses the education page’s rounded 6.14-inch long edge for the small-size format introduced in 1929. Older large notes differ.", "sourceIds": [ "us_currency_note_size" ], "quantity": "length", "sourceValue": "6.14", "sourceUnit": "in", "referenceRevision": "1" }, { "id": "uk-standard-brick-length", "label": "UK standard-format brick", "shortLabel": "UK brick", "category": "everyday_objects", "metres": "0.215", "evidenceKind": "standard_nominal", "fictional": false, "dimension": "brick length excluding mortar", "axis": "brick_length_excluding_mortar", "description": "Nominal UK standard-format brick length, excluding the mortar joint. Historic and non-standard bricks differ.", "sourceIds": [ "wienerberger_uk_brick_size" ], "quantity": "length", "sourceValue": "215", "sourceUnit": "mm", "referenceRevision": "1", "variant": "215 × 102.5 × 65 mm UK format" }, { "id": "standard-cdrom-disc-diameter", "label": "Standard CD-ROM disc", "shortLabel": "CD-ROM disc", "category": "everyday_objects", "metres": "0.120", "evidenceKind": "standard_nominal", "fictional": false, "dimension": "nominal disc diameter", "axis": "nominal_disc_diameter", "description": "Nominal disc size covered by ECMA-130. It excludes mini discs and is not the diameter of the central hole.", "sourceIds": [ "ecma_130_cdrom" ], "quantity": "length", "sourceValue": "120", "sourceUnit": "mm", "referenceRevision": "1", "variant": "120 mm CD-ROM; ECMA-130 second edition" }, { "id": "iphone16-2024-height", "label": "Apple iPhone 16", "shortLabel": "iPhone 16", "category": "electronics", "metres": "0.1476", "evidenceKind": "manufacturer_nominal", "fictional": false, "dimension": "body height", "axis": "body_height", "description": "Listed phone-body height for the base iPhone 16. Excludes an added case and is not the display diagonal.", "sourceIds": [ "apple_iphone16_2024" ], "quantity": "length", "sourceValue": "147.6", "sourceUnit": "mm", "referenceRevision": "1", "variant": "Base iPhone 16, 2024; Plus and Pro excluded" }, { "id": "macbook-air13-m3-2024-width", "label": "MacBook Air 13-inch M3", "shortLabel": "MacBook Air", "category": "electronics", "metres": "0.3041", "evidenceKind": "manufacturer_nominal", "fictional": false, "dimension": "body width", "axis": "body_width", "description": "Listed chassis width of the 2024 13-inch M3 model, not its screen diagonal.", "sourceIds": [ "apple_macbook_air13_m3_2024" ], "quantity": "length", "sourceValue": "30.41", "sourceUnit": "cm", "referenceRevision": "1", "variant": "13-inch MacBook Air with M3, 2024" }, { "id": "ps5-slim-2023-listed-width", "label": "Sony PlayStation 5 slim", "shortLabel": "PS5 slim", "category": "electronics", "metres": "0.358", "evidenceKind": "manufacturer_rounded_reference", "fictional": false, "dimension": "manufacturer listed width", "axis": "manufacturer_listed_width", "description": "Sony’s approximate width in its width × height × depth convention, excluding projecting parts. Do not relabel this as height without specifying orientation.", "sourceIds": [ "sony_ps5_slim_2023" ], "quantity": "length", "sourceValue": "358", "sourceUnit": "mm", "referenceRevision": "1", "variant": "2023 slimmer model with Ultra HD Blu-ray drive" }, { "id": "nba-basket-ring-inside-diameter", "label": "NBA basketball hoop", "shortLabel": "basketball hoop", "category": "sports", "metres": "0.4572", "evidenceKind": "standard_nominal", "fictional": false, "dimension": "inside ring diameter", "axis": "inside_ring_diameter", "description": "Regulation inside diameter of the NBA basket ring. This excludes the ring metal’s thickness.", "sourceIds": [ "nba_rule1_equipment" ], "quantity": "length", "sourceValue": "18", "sourceUnit": "in", "referenceRevision": "1" }, { "id": "nba-backboard-width", "label": "NBA basketball backboard", "shortLabel": "basketball backboard", "category": "sports", "metres": "1.8288", "evidenceKind": "standard_nominal", "fictional": false, "dimension": "backboard width", "axis": "backboard_width", "description": "Regulation horizontal dimension of the NBA backboard; not the width of the marked target rectangle.", "sourceIds": [ "nba_rule1_equipment" ], "quantity": "length", "sourceValue": "6", "sourceUnit": "ft", "referenceRevision": "1" }, { "id": "nfl-field-with-end-zones-2026-length", "label": "NFL field including end zones", "shortLabel": "NFL field + end zones", "category": "sports", "metres": "109.7280", "evidenceKind": "standard_nominal", "fictional": false, "dimension": "field length including end zones", "axis": "field_length_including_end_zones", "description": "End-line to end-line length includes both end zones. It excludes external borders and is longer than the 100-yard field of play.", "sourceIds": [ "nfl_field_rules_2026" ], "quantity": "length", "sourceValue": "360", "sourceUnit": "ft", "referenceRevision": "1", "variant": "2026 NFL rulebook" }, { "id": "boeing-787-9-overall-length", "label": "Boeing 787-9 Dreamliner", "shortLabel": "Boeing 787-9", "category": "aircraft", "metres": "62.8", "evidenceKind": "manufacturer_rounded_reference", "fictional": false, "dimension": "overall length", "axis": "overall_length", "description": "Boeing’s one-decimal overall length for the 787-9; other 787 variants have different lengths.", "sourceIds": [ "boeing_7879_specs" ], "quantity": "length", "sourceValue": "62.8", "sourceUnit": "m", "referenceRevision": "1", "variant": "787-9" }, { "id": "airbus-a320neo-overall-length", "label": "Airbus A320neo", "shortLabel": "Airbus A320neo", "category": "aircraft", "metres": "37.57", "evidenceKind": "manufacturer_nominal", "fictional": false, "dimension": "overall length", "axis": "overall_length", "description": "Manufacturer-listed overall aircraft length. Cabin length and other A320-family models must not be substituted.", "sourceIds": [ "airbus_a320neo_specs" ], "quantity": "length", "sourceValue": "37.57", "sourceUnit": "m", "referenceRevision": "1", "variant": "A320neo" }, { "id": "iss-span-across-arrays", "label": "International Space Station", "shortLabel": "ISS solar-array span", "category": "spacecraft", "metres": "109", "evidenceKind": "published_approximation", "fictional": false, "dimension": "span across solar arrays", "axis": "span_across_solar_arrays", "description": "NASA’s published span across the solar arrays. It is not the separate module-train length or orbital altitude.", "sourceIds": [ "nasa_iss_structural_span" ], "quantity": "length", "sourceValue": "109", "sourceUnit": "m", "referenceRevision": "1", "variant": "Assembled structure, NASA 109 m reference" }, { "id": "saturn-v-apollo-stack-height", "label": "Saturn V with Apollo spacecraft", "shortLabel": "Saturn V stack", "category": "spacecraft", "metres": "110.6424", "evidenceKind": "published_approximation", "fictional": false, "dimension": "apollo launch stack height", "axis": "apollo_launch_stack_height", "description": "Uses NASA’s rounded 363-foot Apollo launch-stack height, including spacecraft. 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Other SLS configurations differ.", "sourceIds": [ "nasa_sls_block1_size" ], "quantity": "length", "sourceValue": "322", "sourceUnit": "ft", "referenceRevision": "1", "variant": "Artemis I Block 1 with Orion" }, { "id": "voyager-high-gain-antenna-diameter", "label": "Voyager high-gain antenna", "shortLabel": "Voyager antenna", "category": "spacecraft", "metres": "3.7", "evidenceKind": "published_approximation", "fictional": false, "dimension": "high gain antenna diameter", "axis": "high_gain_antenna_diameter", "description": "Approximate diameter of the dish shared by the twin Voyager designs; not the span of their long instrument booms.", "sourceIds": [ "nasa_voyager_dimensions" ], "quantity": "length", "sourceValue": "3.7", "sourceUnit": "m", "referenceRevision": "1", "variant": "Voyager 1 and 2 high-gain antenna design" }, { "id": "earth-volumetric-mean-diameter", "label": "Earth — mean diameter", "shortLabel": "Earth", "category": "science", "metres": "12742016.8000", "evidenceKind": "published_approximation", "fictional": false, "dimension": "volumetric mean diameter", "axis": "volumetric_mean_diameter", "description": "Twice JPL’s 6371.0084 km volumetric mean radius. 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Alternate, Mega, and Gigantamax forms are outside this definition; this is not a real organism or a toy measurement.", "sourceIds": [ "play_pokemon_0133" ], "quantity": "length", "sourceValue": "0.3", "sourceUnit": "m", "referenceRevision": "1", "variant": "Pokédex No.0133, ordinary form" }, { "id": "snorlax-ordinary-height", "label": "Snorlax — ordinary form", "shortLabel": "Snorlax heights", "category": "fiction", "metres": "2.1", "evidenceKind": "official_fictional_reference", "fictional": true, "dimension": "official Pokédex height", "axis": "official_pokedex_height", "description": "Official fictional height for the ordinary form in this Pokédex entry. 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Alternate, Mega, and Gigantamax forms are outside this definition; this is not a real organism or a toy measurement.", "sourceIds": [ "play_pokemon_0006" ], "quantity": "length", "sourceValue": "1.7", "sourceUnit": "m", "referenceRevision": "1", "variant": "Pokédex No.0006, ordinary form" }, { "id": "gengar-ordinary-height", "label": "Gengar — ordinary form", "shortLabel": "Gengar heights", "category": "fiction", "metres": "1.5", "evidenceKind": "official_fictional_reference", "fictional": true, "dimension": "official Pokédex height", "axis": "official_pokedex_height", "description": "Official fictional height for the ordinary form in this Pokédex entry. Alternate, Mega, and Gigantamax forms are outside this definition; this is not a real organism or a toy measurement.", "sourceIds": [ "play_pokemon_0094" ], "quantity": "length", "sourceValue": "1.5", "sourceUnit": "m", "referenceRevision": "1", "variant": "Pokédex No.0094, ordinary form" }, { "id": "dragonite-ordinary-height", "label": "Dragonite — ordinary form", "shortLabel": "Dragonite heights", "category": "fiction", "metres": "2.2", "evidenceKind": "official_fictional_reference", "fictional": true, "dimension": "official Pokédex height", "axis": "official_pokedex_height", "description": "Official fictional height for the ordinary form in this Pokédex entry. Alternate, Mega, and Gigantamax forms are outside this definition; this is not a real organism or a toy measurement.", "sourceIds": [ "play_pokemon_0149" ], "quantity": "length", "sourceValue": "2.2", "sourceUnit": "m", "referenceRevision": "1", "variant": "Pokédex No.0149, ordinary form" }, { "id": "lego-10307-model-height", "label": "LEGO Eiffel Tower model", "shortLabel": "LEGO Eiffel heights", "category": "toys", "metres": "1.49", "evidenceKind": "manufacturer_rounded_reference", "fictional": false, "dimension": "assembled model height", "axis": "assembled_model_height", "description": "Published height of the assembled LEGO model. The Dimensions card gives 149 cm; descriptive prose says over 149 cm. This stored rounded model reference is not the real Eiffel Tower or an exact specimen measurement.", "sourceIds": [ "play_lego_10307" ], "quantity": "length", "sourceValue": "149", "sourceUnit": "cm", "referenceRevision": "1", "variant": "LEGO set 10307" }, { "id": "lego-10294-model-length", "label": "LEGO Titanic model", "shortLabel": "LEGO Titanic lengths", "category": "toys", "metres": "1.35", "evidenceKind": "manufacturer_rounded_reference", "fictional": false, "dimension": "assembled model length", "axis": "assembled_model_length", "description": "Published length of the assembled 1:200 LEGO model. The card gives 135 cm and prose describes over 135 cm; this is a rounded reference for the model, not the actual ship or a packaging dimension.", "sourceIds": [ "play_lego_10294" ], "quantity": "length", "sourceValue": "135", "sourceUnit": "cm", "referenceRevision": "1", "variant": "LEGO set 10294" }, { "id": "lego-10281-model-height", "label": "LEGO Bonsai Tree model", "shortLabel": "LEGO bonsai heights", "category": "toys", "metres": "0.18", "evidenceKind": "manufacturer_rounded_reference", "fictional": false, "dimension": "assembled model height", "axis": "assembled_model_height", "description": "Uses the model's 18 cm height from the Dimensions card; prose describes over 18 cm. Leaf arrangements are adjustable, so this is a rounded reference configuration, not an exact height for every build or a living bonsai.", "sourceIds": [ "play_lego_10281" ], "quantity": "length", "sourceValue": "18", "sourceUnit": "cm", "referenceRevision": "1", "variant": "LEGO set 10281" }, { "id": "lego-21323-model-width", "label": "LEGO Grand Piano model", "shortLabel": "LEGO piano widths", "category": "toys", "metres": "0.305", "evidenceKind": "manufacturer_rounded_reference", "fictional": false, "dimension": "assembled model width", "axis": "assembled_model_width", "description": "Uses the 30.5 cm width in the detailed closed-model specifications; the Dimensions card rounds it to 31 cm. 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It is a rounded model-height reference, not the globe sphere's diameter or the size of Earth.", "sourceIds": [ "play_lego_21332" ], "quantity": "length", "sourceValue": "40", "sourceUnit": "cm", "referenceRevision": "1", "variant": "LEGO set 21332" }, { "id": "lego-21327-model-width", "label": "LEGO Typewriter model", "shortLabel": "LEGO typewriter widths", "category": "toys", "metres": "0.27", "evidenceKind": "manufacturer_rounded_reference", "fictional": false, "dimension": "assembled model width", "axis": "assembled_model_width", "description": "Published 27 cm width of the assembled LEGO typewriter model. The manufacturer presents rounded centimetre dimensions; this is not a measurement of a working full-size typewriter or the box.", "sourceIds": [ "play_lego_21327" ], "quantity": "length", "sourceValue": "27", "sourceUnit": "cm", "referenceRevision": "1", "variant": "LEGO set 21327" }, { "id": "lego-10318-model-length", "label": "LEGO Concorde model", "shortLabel": "LEGO Concorde lengths", "category": "toys", "metres": "1.05", "evidenceKind": "manufacturer_rounded_reference", "fictional": false, "dimension": "assembled model length", "axis": "assembled_model_length", "description": "Published 105 cm length of the assembled LEGO Concorde model. 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Other models may differ.", "sourceIds": [ "play_klein_d213_9ne_cr" ], "quantity": "length", "sourceValue": "9.35", "sourceUnit": "in", "referenceRevision": "1", "variant": "Model D213-9NE-CR" }, { "id": "klein-11055-overall-length", "label": "Klein wire stripper and cutter", "shortLabel": "wire-stripper lengths", "category": "tools", "metres": "0.18796", "evidenceKind": "manufacturer_nominal", "fictional": false, "dimension": "overall length", "axis": "overall_length", "description": "Manufacturer-listed overall tool length for Model 11055: 7.4 in. This measures the whole tool and excludes packaging. Other models may differ.", "sourceIds": [ "play_klein_11055" ], "quantity": "length", "sourceValue": "7.4", "sourceUnit": "in", "referenceRevision": "1", "variant": "Model 11055" }, { "id": "klein-935r-overall-length", "label": "Klein torpedo level", "shortLabel": "torpedo-level lengths", "category": "tools", "metres": "0.2286", "evidenceKind": "manufacturer_nominal", "fictional": false, "dimension": "overall length", "axis": "overall_length", "description": "Manufacturer-listed overall tool length for Model 935R: 9 in. This measures the whole tool and excludes packaging. Other models may differ.", "sourceIds": [ "play_klein_935r" ], "quantity": "length", "sourceValue": "9", "sourceUnit": "in", "referenceRevision": "1", "variant": "Model 935R" }, { "id": "klein-h80718-overall-length", "label": "Klein straight-claw hammer", "shortLabel": "hammer lengths", "category": "tools", "metres": "0.37592", "evidenceKind": "manufacturer_nominal", "fictional": false, "dimension": "overall length", "axis": "overall_length", "description": "Manufacturer-listed overall tool length for Model H80718: 14.8 in. This measures the whole tool and excludes packaging. Other models may differ.", "sourceIds": [ "play_klein_h80718" ], "quantity": "length", "sourceValue": "14.8", "sourceUnit": "in", "referenceRevision": "1", "variant": "Model H80718" }, { "id": "klein-g46hc-overall-length", "label": "Klein safety scissors", "shortLabel": "safety-scissor lengths", "category": "tools", "metres": "0.168275", "evidenceKind": "manufacturer_nominal", "fictional": false, "dimension": "overall length", "axis": "overall_length", "description": "Manufacturer-listed overall tool length for Model G46HC: 6.625 in. This measures the whole tool and excludes packaging. Other models may differ.", "sourceIds": [ "play_klein_g46hc" ], "quantity": "length", "sourceValue": "6.625", "sourceUnit": "in", "referenceRevision": "1", "variant": "Model G46HC" }, { "id": "klein-d86930-overall-length", "label": "Klein adjustable pipe wrench", "shortLabel": "adjustable-wrench lengths", "category": "tools", "metres": "0.26035", "evidenceKind": "manufacturer_nominal", "fictional": false, "dimension": "overall length", "axis": "overall_length", "description": "Manufacturer-listed overall tool length for Model D86930: 10.25 in. This measures the whole tool and excludes packaging. Other models may differ.", "sourceIds": [ "play_klein_d86930" ], "quantity": "length", "sourceValue": "10.25", "sourceUnit": "in", "referenceRevision": "1", "variant": "Model D86930" }, { "id": "leatherman-wave-plus-closed-length", "label": "Leatherman Wave Plus", "shortLabel": "Wave Plus closed lengths", "category": "tools", "metres": "0.1016", "evidenceKind": "manufacturer_nominal", "fictional": false, "dimension": "closed tool length", "axis": "closed_tool_length", "description": "Manufacturer-listed closed length of the Wave Plus multitool. All implements are folded; the open-tool length and blade length are different measurements.", "sourceIds": [ "play_leatherman_wave" ], "quantity": "length", "sourceValue": "4", "sourceUnit": "in", "referenceRevision": "1", "variant": "Wave Plus, closed" }, { "id": "felco-2-pruner-net-length", "label": "FELCO 2 pruning shears", "shortLabel": "FELCO pruner lengths", "category": "tools", "metres": "0.214884", "evidenceKind": "manufacturer_rounded_reference", "fictional": false, "dimension": "net tool length", "axis": "net_tool_length", "description": "Uses the 8.46 in net tool length stated on FELCO's North American product page. It is not the cutting diameter, blade length, shipping length, or a generic size for all pruning shears.", "sourceIds": [ "play_felco_2" ], "quantity": "length", "sourceValue": "8.46", "sourceUnit": "in", "referenceRevision": "1", "variant": "FELCO 2 hand pruner, North American specification" }, { "id": "fennec-fox-ear-length-midpoint", "label": "Fennec fox ear", "shortLabel": "fennec ear lengths", "category": "animals", "metres": "0.127", "evidenceKind": "editorial_range_midpoint", "fictional": false, "dimension": "ear length", "axis": "ear_length", "description": "Chosen midpoint of the zoo's 4–6 in ear-length range. It is not a measured average, body length, or distance from ear tip to ear tip; individual animals vary.", "sourceIds": [ "play_zoo_fennec_fox" ], "quantity": "length", "sourceValue": "5", "sourceUnit": "in", "referenceRevision": "1", "variant": "One ear, species-level descriptive range", "range": { "sourceLow": "4", "sourceHigh": "6", "sourceUnit": "in", "lowMetres": "0.1016", "highMetres": "0.1524", "meaning": "Published descriptive range; sample size and sampling date are not stated. UniRuler selects its midpoint, not a measured mean." } }, { "id": "ringtail-body-length-midpoint", "label": "Ringtail", "shortLabel": "ringtail body lengths", "category": "animals", "metres": "0.381", "evidenceKind": "editorial_range_midpoint", "fictional": false, "dimension": "body length excluding tail", "axis": "body_length_excluding_tail", "description": "Chosen midpoint of the zoo's 12–18 in body-length range. The tail is excluded. This is a transparent comparison reference, not a measured population mean or an individual animal's exact length.", "sourceIds": [ "play_zoo_ringtail" ], "quantity": "length", "sourceValue": "15", "sourceUnit": "in", "referenceRevision": "1", "variant": "Body only, excluding the separately listed tail", "range": { "sourceLow": "12", "sourceHigh": "18", "sourceUnit": "in", "lowMetres": "0.3048", "highMetres": "0.4572", "meaning": "Published descriptive range; sample size and sampling date are not stated. UniRuler selects its midpoint, not a measured mean." } }, { "id": "capybara-length-midpoint", "label": "Capybara", "shortLabel": "capybara lengths", "category": "animals", "metres": "1.15", "evidenceKind": "editorial_range_midpoint", "fictional": false, "dimension": "body length", "axis": "body_length", "description": "Chosen midpoint of the zoo's published 100–130 cm length range. Uses the stated metric range directly; it is not a measured mean and does not represent shoulder height.", "sourceIds": [ "play_zoo_capybara" ], "quantity": "length", "sourceValue": "115", "sourceUnit": "cm", "referenceRevision": "1", "variant": "Zoo profile's centimetre length range", "range": { "sourceLow": "100", "sourceHigh": "130", "sourceUnit": "cm", "lowMetres": "1", "highMetres": "1.3", "meaning": "Published descriptive range; sample size and sampling date are not stated. UniRuler selects its midpoint, not a measured mean." } }, { "id": "red-panda-body-length-midpoint", "label": "Red panda", "shortLabel": "red panda body lengths", "category": "animals", "metres": "0.5715", "evidenceKind": "editorial_range_midpoint", "fictional": false, "dimension": "body length excluding tail", "axis": "body_length_excluding_tail", "description": "Chosen midpoint of the zoo's 20–25 in length range, explicitly excluding the tail. Individual sizes vary; this is not a sample mean or a standing-height measurement.", "sourceIds": [ "play_zoo_red_panda" ], "quantity": "length", "sourceValue": "22.5", "sourceUnit": "in", "referenceRevision": "1", "variant": "Body length, tail excluded", "range": { "sourceLow": "20", "sourceHigh": "25", "sourceUnit": "in", "lowMetres": "0.508", "highMetres": "0.635", "meaning": "Published descriptive range; sample size and sampling date are not stated. UniRuler selects its midpoint, not a measured mean." } }, { "id": "african-penguin-height-midpoint", "label": "African penguin", "shortLabel": "African penguin heights", "category": "animals", "metres": "0.6477", "evidenceKind": "editorial_range_midpoint", "fictional": false, "dimension": "standing height", "axis": "standing_height", "description": "Chosen midpoint of the zoo's 24–27 in height range. It is not a measured mean; the source notes that males are generally slightly larger than females.", "sourceIds": [ "play_zoo_african_penguin" ], "quantity": "length", "sourceValue": "25.5", "sourceUnit": "in", "referenceRevision": "1", "variant": "African penguin, zoo profile's height range", "range": { "sourceLow": "24", "sourceHigh": "27", "sourceUnit": "in", "lowMetres": "0.6096", "highMetres": "0.6858", "meaning": "Published descriptive range; sample size and sampling date are not stated. UniRuler selects its midpoint, not a measured mean." } }, { "id": "giant-panda-length-midpoint", "label": "Giant panda", "shortLabel": "giant panda lengths", "category": "animals", "metres": "1.6764", "evidenceKind": "editorial_range_midpoint", "fictional": false, "dimension": "body length", "axis": "body_length", "description": "Chosen midpoint of the zoo's approximate 5–6 ft length range. This is body length rather than shoulder height, and is not a measured average of a documented sample.", "sourceIds": [ "play_zoo_giant_panda" ], "quantity": "length", "sourceValue": "5.5", "sourceUnit": "ft", "referenceRevision": "1", "variant": "Zoo profile's approximate length range", "range": { "sourceLow": "5", "sourceHigh": "6", "sourceUnit": "ft", "lowMetres": "1.524", "highMetres": "1.8288", "meaning": "Published descriptive range; sample size and sampling date are not stated. UniRuler selects its midpoint, not a measured mean." } }, { "id": "zebra-height-midpoint", "label": "Zebra", "shortLabel": "zebra heights", "category": "animals", "metres": "1.40208", "evidenceKind": "editorial_range_midpoint", "fictional": false, "dimension": "listed height", "axis": "listed_height", "description": "Chosen midpoint of the zoo's 4.2–5 ft height range in its combined zebra profile. This broad reference does not establish the height of every zebra species, sex, or individual. The source size row does not specify the measuring landmarks or posture.", "sourceIds": [ "play_zoo_zebra" ], "quantity": "length", "sourceValue": "4.6", "sourceUnit": "ft", "referenceRevision": "1", "variant": "Combined zebra profile; no species/sex split in the size row", "range": { "sourceLow": "4.2", "sourceHigh": "5", "sourceUnit": "ft", "lowMetres": "1.28016", "highMetres": "1.524", "meaning": "Published descriptive range; sample size and sampling date are not stated. UniRuler selects its midpoint, not a measured mean." } }, { "id": "bali-myna-listed-length", "label": "Bali myna", "shortLabel": "Bali myna lengths", "category": "animals", "metres": "0.254", "evidenceKind": "published_approximation", "fictional": false, "dimension": "listed bird length", "axis": "listed_bird_length", "description": "Uses the zoo's published 10 in bird-length reference. The source supplies a rounded 25 cm counterpart and no measurement protocol, population sample, or tolerance; it is not a claim that every bird is this length.", "sourceIds": [ "play_zoo_bali_myna" ], "quantity": "length", "sourceValue": "10", "sourceUnit": "in", "referenceRevision": "1", "variant": "Bali myna, zoo profile's length reference" }, { "id": "lychee-diameter-midpoint", "label": "Lychee", "shortLabel": "lychee diameters", "category": "fruits", "metres": "0.03175", "evidenceKind": "editorial_range_midpoint", "fictional": false, "dimension": "fruit diameter", "axis": "fruit_diameter", "description": "Chosen midpoint of the guide's 1.0–1.5 in fruit-diameter range. Includes the skin; no cultivar-specific sample or measured mean is supplied, and individual fruit varies.", "sourceIds": [ "play_uf_lychee" ], "quantity": "length", "sourceValue": "1.25", "sourceUnit": "in", "referenceRevision": "1", "variant": "Lychee fruit in the Florida home-landscape guide", "range": { "sourceLow": "1", "sourceHigh": "1.5", "sourceUnit": "in", "lowMetres": "0.0254", "highMetres": "0.0381", "meaning": "Descriptive whole-fruit diameter range across varieties; not a sample confidence interval." } }, { "id": "carambola-fruit-length-midpoint", "label": "Star fruit (carambola)", "shortLabel": "star fruit lengths", "category": "fruits", "metres": "0.1016", "evidenceKind": "editorial_range_midpoint", "fictional": false, "dimension": "fruit length", "axis": "fruit_length", "description": "Chosen midpoint of the guide's 2–6 in length range for carambola fruit. The reference runs along the fruit's length, not across its star-shaped cross-section; it is not a measured mean.", "sourceIds": [ "play_uf_carambola" ], "quantity": "length", "sourceValue": "4", "sourceUnit": "in", "referenceRevision": "1", "variant": "Carambola fruit in the Florida home-landscape guide", "range": { "sourceLow": "2", "sourceHigh": "6", "sourceUnit": "in", "lowMetres": "0.0508", "highMetres": "0.1524", "meaning": "Descriptive fruit-length range; variety, maturity, and growing conditions affect actual size." } }, { "id": "passion-fruit-diameter-midpoint", "label": "Passion fruit", "shortLabel": "passion fruit diameters", "category": "fruits", "metres": "0.0575", "evidenceKind": "editorial_range_midpoint", "fictional": false, "dimension": "fruit diameter", "axis": "fruit_diameter", "description": "Chosen midpoint of the publication's 4–7.5 cm whole-fruit diameter range. Purple and yellow types are discussed together; this is not a cultivar-specific measured mean or the diameter of the inner pulp.", "sourceIds": [ "play_uf_passion_fruit" ], "quantity": "length", "sourceValue": "5.75", "sourceUnit": "cm", "referenceRevision": "1", "variant": "Passion fruit, purple and yellow types described together", "range": { "sourceLow": "4", "sourceHigh": "7.5", "sourceUnit": "cm", "lowMetres": "0.04", "highMetres": "0.075", "meaning": "Published whole-fruit range covering the types discussed; a chosen midpoint, not a measured average." } }, { "id": "calamansi-fruit-diameter-midpoint", "label": "Calamansi (calamondin)", "shortLabel": "calamansi diameters", "category": "fruits", "metres": "0.034925", "evidenceKind": "editorial_range_midpoint", "fictional": false, "dimension": "fruit diameter", "axis": "fruit_diameter", "description": "Chosen midpoint of the detailed description's 1–1¾ in whole-fruit diameter range. Uses the specific description rather than the page's broad size-filter bins. It is not a measured Filipino-market average.", "sourceIds": [ "play_ncsu_calamansi" ], "quantity": "length", "sourceValue": "1.375", "sourceUnit": "in", "referenceRevision": "1", "variant": "Whole fruit, detailed description's across-fruit range", "range": { "sourceLow": "1", "sourceHigh": "1.75", "sourceUnit": "in", "lowMetres": "0.0254", "highMetres": "0.04445", "meaning": "Descriptive across-fruit range; no cultivar, sample size, harvest location, or sampling date is given." } }, { "id": "binjai-rambutan-paukaa-length", "label": "Binjai rambutan — Paukaʻa study", "shortLabel": "Binjai rambutan lengths", "category": "fruits", "metres": "0.0425", "evidenceKind": "published_approximation", "fictional": false, "dimension": "fruit length blossom to stem", "axis": "fruit_length_blossom_to_stem", "description": "Reported mature-fruit length at 18 weeks after anthesis in the Paukaʻa study. Length runs from blossom to stem end. The study monitored 75 fruit per site; this reported reference is specific to its cultivar, orchard, and season.", "sourceIds": [ "play_hawaii_rambutan" ], "quantity": "length", "sourceValue": "42.5", "sourceUnit": "mm", "referenceRevision": "1", "variant": "Binjai cultivar, Paukaʻa orchard, Hawaiʻi; monitoring began September 15, 2004", "sampleCountMeaning": "Design cohort: 5 trees × 15 panicles × 1 fruit per panicle at the selected site; endpoint attrition was not separately reported.", "sampleCount": 75, "samplingDate": "Monitoring began 2004-09-15; selected endpoint was 18 weeks after anthesis." }, { "id": "slicing-cucumber-harvest-length-midpoint", "label": "Slicing cucumber — harvest size", "shortLabel": "slicing cucumber lengths", "category": "vegetables", "metres": "0.1651", "evidenceKind": "editorial_range_midpoint", "fictional": false, "dimension": "harvest fruit length", "axis": "harvest_fruit_length", "description": "Chosen midpoint of the extension guide's recommended 5–8 in slicing-cucumber harvest length. This describes a harvest-size reference, not the average size of every cultivar or fully mature cucumber.", "sourceIds": [ "play_umd_cucumbers" ], "quantity": "length", "sourceValue": "6.5", "sourceUnit": "in", "referenceRevision": "1", "variant": "Slicing cucumbers, not pickling types", "range": { "sourceLow": "5", "sourceHigh": "8", "sourceUnit": "in", "lowMetres": "0.127", "highMetres": "0.2032", "meaning": "Source's stated type or harvest-size range; a chosen midpoint, not a measured mean or confidence interval." } }, { "id": "italian-eggplant-fruit-length-midpoint", "label": "Italian-type eggplant", "shortLabel": "Italian eggplant lengths", "category": "vegetables", "metres": "0.2032", "evidenceKind": "editorial_range_midpoint", "fictional": false, "dimension": "fruit length", "axis": "fruit_length", "description": "Chosen midpoint of the guide's typical 6–10 in fruit-length range for Italian-type eggplant. It is not a measured mean and should not be applied to every eggplant type.", "sourceIds": [ "play_umd_eggplant" ], "quantity": "length", "sourceValue": "8", "sourceUnit": "in", "referenceRevision": "1", "variant": "Italian types, not slender Chinese or Japanese types", "range": { "sourceLow": "6", "sourceHigh": "10", "sourceUnit": "in", "lowMetres": "0.1524", "highMetres": "0.254", "meaning": "Source's stated type or harvest-size range; a chosen midpoint, not a measured mean or confidence interval." } }, { "id": "zucchini-harvest-length-midpoint", "label": "Zucchini — harvest size", "shortLabel": "zucchini lengths", "category": "vegetables", "metres": "0.1778", "evidenceKind": "editorial_range_midpoint", "fictional": false, "dimension": "harvest fruit length", "axis": "harvest_fruit_length", "description": "Chosen midpoint of the recommended 6–8 in harvest length for elongated summer squash such as zucchini. This excludes pattypan and crooked-neck sizing and is not the plant's maximum fruit size.", "sourceIds": [ "play_umd_summer_squash_zucchini" ], "quantity": "length", "sourceValue": "7", "sourceUnit": "in", "referenceRevision": "1", "variant": "Elongated summer-squash types, harvested immature", "range": { "sourceLow": "6", "sourceHigh": "8", "sourceUnit": "in", "lowMetres": "0.1524", "highMetres": "0.2032", "meaning": "Source's stated type or harvest-size range; a chosen midpoint, not a measured mean or confidence interval." } }, { "id": "okra-harvest-pod-length-midpoint", "label": "Okra pod — harvest size", "shortLabel": "okra pod lengths", "category": "vegetables", "metres": "0.0762", "evidenceKind": "editorial_range_midpoint", "fictional": false, "dimension": "harvest pod length", "axis": "harvest_pod_length", "description": "Chosen midpoint of the recommended 2–4 in length for young, tender okra pods. This is a harvest-size reference, not a cultivar-specific mean or the maximum length of a mature woody pod.", "sourceIds": [ "play_umd_okra" ], "quantity": "length", "sourceValue": "3", "sourceUnit": "in", "referenceRevision": "1", "variant": "Young tender pods, approximately 1–3 days after flowering", "range": { "sourceLow": "2", "sourceHigh": "4", "sourceUnit": "in", "lowMetres": "0.0508", "highMetres": "0.1016", "meaning": "Source's stated type or harvest-size range; a chosen midpoint, not a measured mean or confidence interval." } }, { "id": "beetroot-harvest-diameter-midpoint", "label": "Beetroot — harvest size", "shortLabel": "beetroot diameters", "category": "vegetables", "metres": "0.0508", "evidenceKind": "editorial_range_midpoint", "fictional": false, "dimension": "harvest root diameter", "axis": "harvest_root_diameter", "description": "Chosen midpoint of the guide's 1–3 in beetroot harvest-diameter range. It measures across the root and excludes the leaves; it is not a measured average of all beetroots.", "sourceIds": [ "play_umd_beets" ], "quantity": "length", "sourceValue": "2", "sourceUnit": "in", "referenceRevision": "1", "variant": "Edible root at the recommended harvest stage", "range": { "sourceLow": "1", "sourceHigh": "3", "sourceUnit": "in", "lowMetres": "0.0254", "highMetres": "0.0762", "meaning": "Source's stated type or harvest-size range; a chosen midpoint, not a measured mean or confidence interval." } }, { "id": "spring-radish-harvest-diameter", "label": "Spring radish — harvest size", "shortLabel": "spring radish diameters", "category": "vegetables", "metres": "0.0254", "evidenceKind": "published_approximation", "fictional": false, "dimension": "harvest root diameter", "axis": "harvest_root_diameter", "description": "Uses the guide's approximate 1 in diameter for harvesting spring radishes, with cultivar variation acknowledged. This is a chosen harvest-stage reference across the edible root, not a global average or a daikon length.", "sourceIds": [ "play_umd_radishes" ], "quantity": "length", "sourceValue": "1", "sourceUnit": "in", "referenceRevision": "1", "variant": "Spring radish, recommended harvest size; cultivar-dependent" } ], "sources": { "nist_length": { "publisher": "NIST", "url": "https://www.nist.gov/pml/owm/si-units-length", "locator": "Units of Length; FAQ on inch redefinition", "contentCheckedOn": "2026-10-18", "id": "nist_length" }, "nist_foot": { "publisher": "NIST", "url": "https://www.nist.gov/pml/us-surveyfoot/revised-unit-conversion-factors", "locator": "International foot metric-equivalent table", "contentCheckedOn": "2026-10-18", "id": "nist_foot" }, "icao_card": { "publisher": "ICAO", "url": "https://www.icao.int/sites/default/files/publications/DocSeries/9303_p5_cons_en.pdf", "locator": "Section 2.1; PDF page 9; nominal ID-1 dimensions referenced by TD1", "contentCheckedOn": "2026-10-18", "id": "icao_card" }, "epson_paper": { "publisher": "Epson", "url": "https://files.support.epson.com/htmldocs/r800__/r800__rf/spec_2.htm", "locator": "Paper specifications — single sheets", "contentCheckedOn": "2026-10-18", "id": "epson_paper" }, "mint_quarter": { "publisher": "United States Mint", "url": "https://www.usmint.gov/learn/coins-and-medals/circulating-coins/quarter", "locator": "Coin specifications — diameter", "contentCheckedOn": "2026-10-18", "id": "mint_quarter" }, "ittf_2025": { "publisher": "International Table Tennis Federation", "url": "https://db.ittf.com/sites/default/files/public/2025-02/2025_ITTF_Statutes_clean_version.pdf", "edition": "2025", "locator": "Printed/PDF page 38, sections 2.1.1 and 2.3.1", "contentCheckedOn": "2026-10-18", "id": "ittf_2025" }, "klein_613_3": { "publisher": "Klein Tools", "url": "https://data.kleintools.com/sites/all/product_assets/documents/brochures/klein/KleinTools_Drivers.pdf", "locator": "PDF page 5, Electronics Screwdrivers table, model 613-3", "contentCheckedOn": "2026-10-18", "id": "klein_613_3" }, "lego_75192": { "publisher": "LEGO", "url": "https://www.lego.com/en-us/product/millennium-falcon-75192", "locator": "Specifications, assembled dimensions", "contentCheckedOn": "2026-10-18", "id": "lego_75192" }, "boeing_747_8": { "publisher": "Boeing", "url": "https://www.boeing.cn/productsandservices/747/", "locator": "747-8 Intercontinental technical specifications — wingspan", "corroboratingUrl": "https://www.boeing.com/content/dam/boeing/v2/airports/7478-airport-comp/AERO_2010_q3_article3.pdf", "contentCheckedOn": "2026-10-18", "id": "boeing_747_8" }, "usask_apple": { "publisher": "University of Saskatchewan Fruit Program", "url": "https://research-groups.usask.ca/fruit/our-varieties/apple-varieties.php", "locator": "Prairie Sensation, accession 18-10-32", "contentCheckedOn": "2026-10-18", "id": "usask_apple" }, "pokemon_pikachu": { "publisher": "The Pokémon Company", "url": "https://in.portal-pokemon.com/pokedex/0025/", "locator": "Pikachu No.0025, ordinary form, Height", "contentCheckedOn": "2026-10-18", "id": "pokemon_pikachu" }, "umd_carrot": { "publisher": "University of Maryland Extension", "url": "https://www.extension.umd.edu/resource/growing-carrots-home-garden", "locator": "Growing and care of carrots — Nantes types", "pageUpdatedOn": "2023-02-20", "contentCheckedOn": "2026-10-18", "id": "umd_carrot" }, "victorinox_spartan": { "publisher": "Victorinox", "title": "Spartan — item 1.3603.T", "url": "https://www.victorinox.com/en/Products/Swiss-Army-Knife%E2%84%A2-and-Tools/Essentials/Spartan/p/1.3603.T", "locator": "Dimensions: Length; Details: Item number", "sourceType": "primary_manufacturer", "contentCheckedOn": "2026-10-18", "factSummary": "The product specification lists length 91 mm for Spartan item 1.3603.T.", "identityConfidence": "high", "factPublishability": "publishable_with_stated_qualifications", "publicLinkCheck": { "checkedOn": "2026-10-18", "method": "fresh_http_get_via_firecrawl", "cacheMaxAgeSeconds": 0, "statusCode": 200, "finalUrl": "https://www.victorinox.com/en/Products/Swiss-Army-Knife%E2%84%A2-and-Tools/Essentials/Spartan/p/1.3603.T", "contentType": "text/html; charset=utf-8", "identityMatched": true, "measurementFoundInResponse": true, "linkPublishability": "publish_ready" }, "id": "victorinox_spartan" }, "nintendo": { "publisher": "Nintendo", "title": "Nintendo Switch OLED model console [HEG-001] specifications", "url": "https://www.nintendo.com/ph/hardware/switch/modal/specs/body_oled.html", "locator": "Size row, including the with-Joy-Con qualifier", "sourceType": "primary_manufacturer", "contentCheckedOn": "2026-10-18", "factSummary": "The console is specified as 242 mm wide with the Joy-Con controllers attached.", "identityConfidence": "high", "factPublishability": "publishable_with_stated_qualifications", "publicLinkCheck": { "checkedOn": "2026-10-18", "method": "fresh_http_get_via_firecrawl", "cacheMaxAgeSeconds": 0, "statusCode": 200, "finalUrl": "https://www.nintendo.com/ph/hardware/switch/modal/specs/body_oled.html", "contentType": "text/html", "identityMatched": true, "measurementFoundInResponse": true, "linkPublishability": "publish_ready" }, "id": "nintendo" }, "apple_airpods_case": { "publisher": "Apple", "title": "AirPods Pro 2 with MagSafe Charging Case (USB-C) — Tech Specs", "url": "https://support.apple.com/en-us/111834", "locator": "Size and Weight: MagSafe Charging Case (USB-C); 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charset=UTF-8", "identityMatched": true, "measurementFoundInResponse": true, "linkPublishability": "publish_ready" }, "id": "nasa_webb" }, "nasa_curiosity": { "publisher": "NASA / Jet Propulsion Laboratory", "title": "NASA Mars Rover Curiosity at JPL, Side View", "url": "https://science.nasa.gov/photojournal/nasa-mars-rover-curiosity-at-jpl-side-view/", "locator": "Photojournal PIA13808: description paragraph", "sourceType": "primary_mission_operator", "contentCheckedOn": "2026-10-18", "factSummary": "NASA describes a rover length of about 3 m before adding the reach of the forward-extending arm.", "identityConfidence": "high", "factPublishability": "publishable_with_stated_qualifications", "publicLinkCheck": { "checkedOn": "2026-10-18", "method": "fresh_http_get_via_firecrawl", "cacheMaxAgeSeconds": 0, "statusCode": 200, "finalUrl": "https://science.nasa.gov/photojournal/nasa-mars-rover-curiosity-at-jpl-side-view/", "contentType": "text/html; charset=UTF-8", "identityMatched": true, "measurementFoundInResponse": true, "linkPublishability": "publish_ready" }, "referencePublishedOn": "2011-04-06", "id": "nasa_curiosity" }, "airbus_a380": { "publisher": "Airbus", "title": "A380 Facts and Figures — February 2022", "url": "https://www.airbus.com/sites/g/files/jlcbta136/files/2025-01/airbus-a380-facts-and-figures-february-2022.pdf", "locator": "PDF page 3 of 4: Overall length row", "sourceType": "primary_manufacturer", "contentCheckedOn": "2026-10-18", "factSummary": "The February 2022 factsheet gives an overall aircraft length of 72.7 m.", "identityConfidence": "high", "factPublishability": "publishable_with_stated_qualifications", "publicLinkCheck": { "checkedOn": "2026-10-18", "method": "fresh_http_get_via_firecrawl", "cacheMaxAgeSeconds": 0, "statusCode": 200, "finalUrl": "https://www.airbus.com/sites/g/files/jlcbta136/files/2025-01/airbus-a380-facts-and-figures-february-2022.pdf", "contentType": "application/pdf", "identityMatched": true, "measurementFoundInResponse": true, "linkPublishability": "publish_ready" }, "referencePublishedOn": "2022-02", "referenceEdition": "February 2022", "edition": "February 2022", "id": "airbus_a380" }, "mcc_pitch": { "publisher": "Marylebone Cricket Club (MCC)", "title": "Law 6: The Pitch", "url": "https://lawsofcricket.lords.org/laws-of-cricket/setting-up-the-game/the-pitch", "locator": "6.1 Area of pitch; 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