Ring Size Chart

US/Canada Circumference/mm Great Britain/UK/Australia Germany France Japan
0 36.5 - - - -
1 39.1 - - - -
1 1/4 40.2 C 12 3/4 40 1/2 　
2 41.5 D 13 1/4 41 1/2 1
2 1/4 42 - - - 2
2 1/2 42.7 E 13 3/4 42 3/4 　
2 3/4 43.2 - - - 3
3 44 F 14 44 4
3 1/4 45 - - - 5
3 1/2 45.2 G 141/2 45 1/4 -
3 3/4 46.2 - - - 6
4 46.5 H1/2 15 46 1/2 7
4 1/2 47.8 I1/2 15 1/4 47 3/4 8
5 49 J1/2 15 3/4 49 9
5 1/4 49.8 - - - 10
5 1/2 50.2 L 16 50 1/4 　
5 3/4 51 - - - 11
6 51.5 M 16 1/4 51 1/2 12
6 1/2 52.8 N 17 52 3/4 13
7 54 N1/2 17 1/4 54 14
7 1/4 55.3 O1/2 17 1/2 55 1/2 15
8 56.6 P1/2 18 56 3/4 16
8 1/2 57.8 Q1/2 18 1/4 58 17
9 59.1 R1/2 19 59 1/4 18
9 1/2 60.3 S1/2 19 1/4 60 1/2 19
10 61.6 T1/2 20 61 3/4 20
10 1/2 62.8 U1/2 20 1/4 62 3/4 21
11 64.1 V1/2 20 3/4 64 1/4 22
11 1/2 66 W1/2 21 66 23
12 67.2 Y 21 3/4 67 1/4 24
12 1/2 68.4 Z - - 25
13 69.7 Z1/2 22 - 26
13 1/2 71 Z1 - - -
14 72.3 - - - -