Ring Size Guide

 

Circ. (mm) Dia. (mm) UK US EU JP HK CH
43.89 13.97 F 3 44 4 6 4
44.48 14.16 F½ 3.25 44.5 5 – 5¼
45.11 14.36 G 3.5 45 – 7.5 –
45.74 14.56 G½ 3.75 46 6 – 6½
46.37 14.76 H 4 46.5 7 9 –
47.00 14.96 H½ 4.25 47 – – 7¾
47.66 15.17 I 4.5 48 8 10 –
48.29 15.37 J 4.75 48.5 – – 9
48.95 15.58 J½ 5 49 9 11 –
49.57 15.78 K 5.25 50 – – 10
50.20 15.98 K½ 5.5 50.5 10 12 –
50.86 16.19 L 5.75 51 – – 11¾
51.49 16.39 L½ 6 52 11 13 12¾
52.12 16.59 M 6.25 52.5 12 – –
52.75 16.79 M½ 6.5 53 13 14.5 14
53.38 16.99 N 6.75 54 – – –
54.00 17.19 N½ 7 54.5 14 16 15¼
54.63 17.39 O 7.25 55 – – –
55.29 17.60 O½ 7.5 56 15 17 16½
55.92 17.80 P 7.75 56.5 – – –
56.55 18.00 P½ 8 57 16 – 17¾
57.33 18.25 Q 8.25 58 – 18 –
57.81 18.40 Q½ 8.5 58.5 17 19 –
58.43 18.60 R 8.75 59 – – 19
59.06 18.80 R½ 9 60 18 20.5 –
59.69 19.00 S 9.25 60.5 – – 20¼
60.32 19.20 S½ 9.5 61 19 22 –
60.95 19.40 T 9.75 62 – – 21½
61.58 19.60 T½ 10 62.5 20 23 –
62.20 19.80 U 10.25 63 21 – –
62.83 20.00 U½ 10.5 64 22 24 22¾
63.46 20.20 V 10.75 64.5 – – –
64.09 20.40 V½ 11 65 23 25 –
64.72 20.60 W 11.25 66 – – 25
65.35 20.80 W½ 11.5 66.5 24 26 –
65.97 21.00 X 11.75 67 – – –
66.60 21.20 X½ 12 68 25 27.75 27½
67.23 21.40 Y 12.25 68.5 – – –
67.86 21.60 Z 12.5 69 26 – 28¾
68.46 21.79 Z½ 12.75 69.5 – – –
69.08 21.99 – 13 70 27 30 –

 

*Sizing conventions may vary by country, since the regional standards aren't completely interchangeable.