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Ring Size Conversion Chart

 

Use this chart to convert from another Country's size, or to convert your measurements from Circumference or Diameter into your correct ring size. 

If you have questions, don't hesitate to contact us for help. We'd be happy to work with you.

Circumference (mm)
Europe / ISO
Diameter (mm) USA / Canada UK / Australia Asia Switzerland
44.2 14.1 3 F 4 4
44.8 14.3 F-1/2 5 5-1/4
45.5 14.5 3-1/2 G
46.1 14.7 G-1/2 6 6-1/2
46.8 14.9 4 H 7
47.4 15.1 H-1/2 7-3/4
48.0 15.3 4-1/2 I 8
48.7 15.5 J 9
49.3 15.7 5 J-1/2 9
50.0 15.9 K 10
50.6 16.1 5-1/2 K-1/2 10
51.2 16.3 L 11-3/4
51.9 16.5 6 L-1/2 11 12-3/4
52.5 16.7 M 12
53.1 16.9 6-1/2 M-1/2 13 14
53.8 17.1 N
54.4 17.3 7 N-1/2 14 15-1/4
55.1 17.5 O
55.7 17.7 7-1/2 O-1/2 15 16-1/2
56.3 17.9 P
57.0 18.1 8 P-1/2 16 17-3/4
57.6 18.3 Q
58.3 18.5 8-1/2 Q-1/2 17
58.9 18.8 R 19
59.5 19.0 9 R-1/2 18
60.2 19.2 S 20-1/4
60.8 19.4 9-1/2 S-1/2 19
61.4 19.6 T 21-1/2
62.1 19.8 10 T-1/2 20
62.7 20.0 U 21
63.4 20.2 10-1/2 U-1/2 22 22-3/4
64.0 20.4 V
64.6 20.6 11 V-1/2 23
65.3 20.8 W 25
65.9 21.0 11-1/2 W-1/2 24
66.6 21.2 X
67.2 21.4 12 X-1/2 25 27-1/2
67.8 21.6 Y
68.5 21.8 12-1/2 Z 26 28-3/4
69.1 22.0 Z-1/2
69.7 22.2 13 27
70.4 22.4 Z + 1
71.0 22.6 13-1/2