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Ring Size Guide

Ring Size Guide: Japan – EU – US/Canada – UK
JP (号) EU (ISO) US/CA UK Diameter (mm) Circumference (mm)
1 41 1.5 C 12.9 40.8
2 42 2 D 13.2 41.5
3 44 2.5 E 13.7 43
4 46 3 F 14 44
5 47 3.75 G 14.4 45.2
6 48 4 H 14.7 46.1
7 49 4.5 I 15 47.1
8 50.5 5 15.4 48
9 52 5.5 15.7 49.3
10 53 6 16 50.2
11 54.5 6.5 16.4 51.3
12 56 7 16.7 52.5
13 57 7.5 17 53.4
14 58.5 8 17.4 54.7
15 60 8.5 17.7 55.5
16 61 9 18 56.5
17 62.5 9.5 18.4 57.8
18 64 10 18.7 58.6
19 65 10.5 19 59.8
20 66 11 19.4 60.7
21 67.5 11.5 19.7 61.8
22 69 12 Y 20 62.8
23 70 12.5 Z 20.4 64.1
24 71 13 Z+1 20.7 65
25 72.5 13.5 Z+3 21 66