Size guide

Circumference (mm) Diameter (mm) Ring size
48 15.27 4.5
49 15.70 5
51 16.10 5.5
52 16.51 6
53 16.92 6.5
55 17.35 7
56 17.75 7.5
57 18,19 8
58 18.53 8.5
59 18.89 9
61 19.41 9.5
62 19.84 10
63 20,20 10.5
65 20.68 11
66 21.08 11.5
68 21.49 12
69 21.89 12.5
70 22.33 13