International Ring Size Chart

INTERNATIONAL RING SIZE CHART

Inside Diameter (mm) Inside Circumference (mm) US / Canada UK / Europe / Australia Switzerland Asia (Hong Kong / China / Singapore / Taiwan / Japan)
14.1 44.3 3 F 4 4
14.3 44.9 3.25 F 1/2 5.25 5
14.5 45.6 3.5 G
14.7 46.2 3.75 G 1/2 6.5 6
14.9 46.8 4 H 7
15.1 47.4 4.25 H 1/2 7.75
15.3 48.1 4.5 I 8
15.5 48.7 4.75 I 1/2 9
15.7 49.3 5 J 9
15.9 50.0 5.25 J 1/2 10
16.1 50.6 5.5 K 10
16.3 51.2 5.75 K 1/2 11.75
16.5 51.8 6 L 12.75 11
16.7 52.5 6.25 L 1/2 12
16.9 53.1 6.5 M 14 13
17.1 53.7 6.75 M 1/2
17.3 54.3 7 N 15.25 14
17.5 55.0 7.25 N 1/2
17.7 55.6 7.5 O 16.5 15
17.9 56.2 7.75 O 1/2
18.1 56.9 8 P 17.75 16
18.3 57.5 8.25 P 1/2
18.5 58.1 8.5 Q 17
18.8 59.1 8.75 Q 1/2 19
19 59.7 9 R 18
19.2 60.3 9.25 R 1/2 20.25
19.4 60.9 9.5 S 19
19.6 61.6 9.75 S 1/2 21.5
19.8 62.2 10 T 20
20 62.8 10.25 T 1/2 21
20.2 63.5 10.5 U 22.75 22
20.4 64.1 10.75 U 1/2
20.6 64.7 11 V 23
20.8 65.3 11.25 V 1/2 25
21 66.0 11.5 W 24
21.2 66.6 11.75 W 1/2
21.4 67.2 12 X 27.5 25
21.6 67.9 12.25 X 1/2
21.8 68.5 12.5 Y 28.75 26
22 69.1 12.75 Z
22.2 69.7 13 Z 1/2 27
22.4 70.4 13.25
22.6 71.0 13.5 Z1