Ring Size Chart

International Ring Size Conversion Chart

 

Circumference
(mm)
Diameter
(mm)
UK, Europe,
& Australia
United States & Canada China, Singapore, & Japan Hong Kong Switzerland
43.89 13.97 F 3 4 6 4
44.48 14.16 3.25 5
45.11 14.36 G 3.5 7.5
45.74 14.56  3.75 6
46.37 14.76 H 4 7 9
47.00 14.96  4.25
47.66 15.17 I 4.5 8 10
48.29 15.37 J  4.75 9
48.95 15.58 5 9 11
49.57 15.78 K  5.25 10
50.20 15.98 5.5 10 12
50.86 16.19 L  5.75 11¾
51.49 16.39 6 11 13 12¾
52.12 16.59 M  6.25 12
52.75 16.79 6.5 13 14.5 14
53.38 16.99 N  6.75
54.00 17.19 7 14 16 15¼
54.63 17.39 O  7.25
55.29 17.60 7.5 15 17 16½
55.92 17.80 P  7.75
56.55 18.00 8 16 17¾
57.33 18.25 Q  8.25 &18;
57.81 18.40 8.5 17 19
58.43 18.60 R  8.75 19
59.06 18.80 9 18 20.5
59.69 19.00 S  9.25 20¼
60.32 19.20 9.5 19 22
60.95 19.40 T  9.75 21½
61.58 19.60 10 20 23
62.20 19.80 U  10.25 21
62.83 20.00 10.5 22 24 22¾
63.46 20.20 V  10.75
64.09 20.40 11 23 25
64.72 20.60 W  11.25 25
65.35 20.80 11.5 24 26
65.97 21.00 X  11.75
66.60 21.20 12 25 27.75 27½
67.23 21.40 Y  12.25
67.86 21.60 Z 12.5 26 28¾
68.46 21.79  12.75
69.08 21.99 13 27 30
69.71 22.19 Z+1  13.25
70.34 22.39 13.5
70.94 22.58  13.75
71.57 22.78 14
72.19 22.98  14.25
72.82 23.18 14.5
73.42 23.37  14.75
73.95 23.54 15
74.49 23.71  15.25
75.02 23.88 15.5
75.52 24.04  15.75
76.06 24.21 16