Ring Sizing

Different countries use different standards for ring sizing. Our rings are measured using
the U.S. convention. Please refer to the handy chart below for help in converting U.S.
ring sizes. If we have missed any, let us know at customerservice@greatergood.com!

U.S.A. Size U.K. Size French Size German Size Japanese Size Swiss Size Circumference (mm) Diameter (mm)
5 J 1/2 49.5 15.75 9 9.5 49 15.7
6 M 52.75 16.5 12 12.75 51.5 16.51
7 O 55.25 17.25 14 15.25 54 17.35
8 Q 57.75 18 16 17.75 56.6 18.19
9 S 60.25 19 18 20.25 59.1 18.99
10 T 1/2 62 20 20 22.13 61.6 19.84