Conversion
Japan 11 = UK L
Inner circumference ≈ 51.9 mm · diameter ≈ 16.5 mm.
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Full conversion chart

RegionSize
US6
UKL
EU52
France52
Japan11

About this conversion

A Japan 11 ring converts to a UK L. Inner circumference ≈ 51.9 mm · diameter ≈ 16.5 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.