Ring Size Chart

Size measurement per Country Length (mm)
USA AUS / UK JPN GER / RU FR CH/ES CN Perimeter Diameter
4 H 1/2 7 15 46 1/2 7 7 46.68 14.86
5 J 1/2 9 15.75 49 9 9 49.3 15.7
6 M 12 16.5 51.5 11.5 12 51.8 16.5
7 O 14 17.25 54 14 14 54.4 17.3
8 Q 16 18 56.5 16 16 56.9 18.1
9 R 3/4 18 19 59 18 18 59.5 18.9
10 T 1/2 20 20 61.5 20 20 62.1 19.8
11 V 1/2 23 20.75 64 23 23 64.6 20.6
12 Y 25 21.25 66.5 25 25 67.2 21.4