Ring Size Guide

US UK JP DE FR CH Perimeter(CM) Diameter(CM)
5 J 1/2 9 15.75 49 9 49.3 15.7
6 L 1/2 12 16.5 51.5 11.5 51.8 16.5
7 O 14 17.25 54 14 54.4 17.3
8 Q 16 18 56.5 16.5 56.9 18.1
9 S 18 19 59 19 59.5 18.9
10 T 1/2 20 20 61.5 21.5 62.1 19.8
11 V 1/2 23 20.75 64 24 64.6 20.6
12 Y 25 21.25 66.5 27.5 67.2 21.4