International Ring Size Guide

CIRCUMFERENCE
(MM)		 DIAMENTER
(MM)		 EUROPE UK &
AUSTRALIA		 USA &
CANADA		 CHINA SINGAPORE
& JAPAN		 HONG
KONG		 SWITZERLAND KOREA
44.2 14.1 44 F 1/2 3 6 4 6 4 4 1/4
44.8 14.3 45 G 5 5
44.5 14.5 G 1/2 3 1/2 7 7.5 6 1/2 5 1/4
46.1 14.7 46 H 6 5 3/4
46.8 14.9 47 H 1/2 4 8 7 6 6 3/4
47.4 15.1 I 9 7 3/4 7 1/2
48.0 15.3 48 I 1/2 4 1/2 8 10 9 8
48.7 15.5 J 8 1/2
49.3 15.7 49 J 1/2 5 10 9 11 10 9
50.0 15.9 50 K 9 3/4
50.6 16.1 K 1/2 5 1/2 11 10 12 10 1/4
51.9 16.3 51 L 11 3/4 11
51.9 16.5 52 L 1/2 6 12 11 13 12 3/4 11 3/4
52.5 16.7 M 13 12 12
53.1 16.9 53 M 1/2 6 1/2 13 14.5 14 12 3/4
53.8 17.1 N 14 13 1/4
54.4 17.3 54 N 1/2 7 14 16 15 1/4 14
55.1 17.5 55 O 15 14 1/2
55.7 17.7 O 1/2 7 1/2 15 17 16 1/2 15
56.3 17.9 56 P 16 15 3/4
57.0 18.1 57 P 1/2 8 17 16 17 3/4 16 1/4
57.2 18.2 18
57.6 18.3 Q 17
58.3 18.5 58 Q 1/2 8 1/2 18 17 19 17 1/2
58.9 18.8 59 R 19 18 1/2
59.5 19.0 R 1/2 9 19 18 20.5 19
60.2 19.2 60 S 20 20 1/4 19 3/4
60.8 19.4 61 S 1/2 9 1/2 19 22 20 1/4
61.4 19.6 T 21 21 1/2 21
62.1 19.8 62 T 1/2 10 20 23 21 1/2
62.7 20.0 U 22 21 21 3/4
63.4 20.2 63 U 1/2 10 1/2 22 24 22 3/4
64.0 20.4 64 V 23 22 3/4
64.6 20.6 V 1/2 11 23 25 24
65.3 20.8 65 W 24 25 24 1/2
65.9 21.0 66 W 1/2 11 1/2 25 24 26 25
66.6 21.2 X 25 3/4
67.2 21.4 67 X 1/2 12 26 25 27.75 27 1/2 26 1/2
67.8 21.6 Y 27
68.5 21.8 68 Z 12 1/2 26 28 3/4 27 1/2
69.1 22.0 69 Z 1/2 28
69.7 22.2 70 13 27 30 28 3/4
70.4 22.4 Z + 1 29 1/2
71.0 22.6 Z + 2 13 1/2 30