Ring sizes

Size Diameter (mm) Circumference (mm)
1 13.0 41
2 13.3 42
3 13.6 43
4 14.0 44
5 14.3 45
6 14.6 46
7 15.0 47
8 15.3 48
9 15.6 49
10 16.0 50
11 16.3 51
12 16.6 52
13 17.0 53
14 17.3 54
15 17.6 55
16 18.0 56
17 18.3 57
18 18.6 58
19 19.0 59
20 19.3 60
21 19.6 61
22 20.0 62
23 20.3 63
24 20.6 64
25 21.0 65
26 21.3 66
27 21.6 67
28 22.0 68
29 22.3 69
30 22.6 70

 

Please note that ring size measurements may vary slightly depending on individual measurement methods and finger shapes.