Ring size guide.

Length of string (mm)Inside diameter of ring (mm)Ring size
44.3 – 45.014.1 – 14.33
45.5 – 46.214.5 – 14.73.5
46.8 – 47.414.9 – 15.14
48.0 – 48.715.3 – 15.54.5
49.3 – 50.015.7 – 15.95
50.6 – 51.216.1 – 16.35.5
51.8 – 52.516.5 – 16.76
53.1 – 53.716.9 – 17.16.5
54.3 – 55.017.3 – 17.57
55.6 – 56.217.7 – 17.97.5
56.9 – 57.518.1 – 18.38
58.1 – 59.018.5 – 18.88.5
59.7 – 60.319.0 – 19.29
60.9 – 61.619.4 – 19.69.5
62.2 – 62.819.8 – 20.010