Conversion
US 12 = France 67
Inner circumference ≈ 67.2 mm · diameter ≈ 21.4 mm.
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Full conversion chart

RegionSize
US12
UKX
EU67
France67
Japan25

About this conversion

A US 12 ring converts to a France 67. Inner circumference ≈ 67.2 mm · diameter ≈ 21.4 mm. Ring sizes all describe one physical measurement — the inner circumference of the band — that each country labels differently.

To check at home, measure the inside diameter of a ring that already fits and compare it to the millimetre figure above.