Conversion
Japan 16 = US 8
Inner circumference ≈ 57 mm · diameter ≈ 18.1 mm.
Shop US 8 rings on Amazon
As an Amazon Associate I earn from qualifying purchases.

Full conversion chart

RegionSize
US8
UKP
EU57
France57
Japan16

About this conversion

A Japan 16 ring converts to a US 8. Inner circumference ≈ 57 mm · diameter ≈ 18.1 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.