Coins

One-euro coin — diameter

≈ 23.25 mm

The selected diameter for One-euro coin is 23.25 mm (approximate reference).

Nominal standard size · Catalogue uniruler-preview-2026-10-19-r4

What is being measured?

Nominal diameter of the standard €1 circulation coin, independent of its national-side design.

Use the named object, variant and dimension. A manufactured or natural object can differ from this reference.

Dimension
diameter
Reference value
23.25 mm
Evidence
Nominal standard size
In metres
0.02325 m

Put the length in perspective

One One-euro coin represents approximately 0.272 card lengths measured end to end. This is a length ratio; it does not calculate how the objects pack or fit.

One-euro coin · 0.02325 m

Metre · 1 m

Foot (international) · 0.3048 m

One of each reference, on the same linear scale. Very small lengths may not be visible. This compares length, not area or physical fit.
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