Size Guide

US Size Inside Diameter (mm) Circumference (mm) EU Size
4 14.8 mm 46.8 mm 47
4.5 15.2 mm 47.8 mm 48
5 15.6 mm 49.3 mm 49
5.5 16.0 mm 50.6 mm 51
6 16.5 mm 51.9 mm 52
6.5 16.9 mm 53.1 mm 53
7 17.3 mm 54.4 mm 54
7.5 17.7 mm 55.7 mm 56
8 18.2 mm 57.0 mm 57
8.5 18.6 mm 58.3 mm 58
9 19.0 mm 59.5 mm 60
9.5 19.4 mm 60.8 mm 61
10 19.8 mm 62.1 mm 62
10.5 20.2 mm 63.4 mm 63
11 20.6 mm 64.6 mm 65