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友だち登録で500円OFFクーポン!LINE公式アカウント
友だち登録で500円OFFクーポン!LINE公式アカウント

Ring size international comparison

International Standard "ISO-8653"
The inner circumference of the ring(mm)
Japan and USA, UK, Hong Kong comparison
Japan Diameter(mm) Inner circumference(mm) USA United kingdom Hong Kong
41 1 13 40.8 1 C  
42 2 13.3 41.9 2 D  
43 3 13.7 42.9 2.5 E  
44 4 14 44.0 3 F 6
45 5 14.3 45.0 7
46 6 14.7 46.1 3.5 G 8
47 7 15 47.1 4 H 9
48 8 15.3 48.2 4.5 I 10
49 9 15.7 49.2 5 J 11
50 10 16 50.3 5.5 K 12
51 11 16.3 51.3 6 L 13
52 12 16.7 52.4 6.5 M 14
53 13 17 53.4 7 N 15
54 14 17.3 54.5 7.5 O 16
55 15 17.7 55.5 8 P 17
56 16 18 56.6 18
57 17 18.3 57.6 8.5 Q 19
58 18 18.7 58.6 9 R 20
59 19 19 59.7 9.5 S 21
60 20 19.3 60.7 22
61 21 19.7 61.8 10 T 23
62 22 20 62.8 10.5 U 24
63 23 20.3 63.9 11 V 25
64 24 20.7 64.9 11.5 W 26
65 25 21 66.0 12 X 27
66 26 21.3 67.0 12.5 Y 28
67 27 21.7 68.0 13 Z 29