Ring size Circumference (mm) Diameter (mm)
6 46 mm 14.5 mm
7 47 mm 14.8 mm
8 48 mm 15.2 mm
9 49 mm 15.5 mm
10 50 mm 15.8 mm
11 51 mm 16.2 mm
12 52 mm 16.5 mm
13 53 mm 16.8 mm
14 54 mm 17.2 mm
15 55 mm 17.5 mm
16 56 mm 17.8 mm
17 57 mm 18.2 mm
18 58 mm 18.5 mm
19 59 mm 18.8 mm
20 60 mm 19.2 mm
21 61 mm 19.5 mm
22 62 mm 19.8 mm
23 63 mm 20.2 mm
24 64 mm 20.5 mm
25 65 mm 20.8 mm
26 66 mm 21.2 mm
27 67 mm 21.5 mm
28 68 mm 21.8 mm
29 69 mm 22.2 mm
30 70 mm 22.5 mm
31 71 mm 22.8 mm
32 72 mm 23.2 mm
33 73 mm 23.5 mm
34 74 mm 23.8 mm
35 75 mm 24.2 mm
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