SIZE GUIDE

 US UK EUR Circumference (mm) Diameter (mm)
5 J 49 48.7 15.49
6 L 51 51.2 16.31
7 N 54 53.8 17.12
8 P 56 56.3 17.93
9 R 59 58.9 18.75
10 T 61 61.4 19.56
11 V 64 64 20.37
12 X 67 66.6 21.18