HK Ring Size Guide

HK Size Diameter (mm) Circumference (mm)
2 13.67 42.9
3 14.07 44.2
3.5 14.48 45.5
4 14.88 46.8
4.5 15.29 48
5 15.49 48.7
5.5 15.9 50
6 16,31 51.2
6.5 16.71 52.5
7 17.12 53.8
7.5 17.53 55.1