Size Heel to Toe Inches Heel to Toe CM
3 8.46 21.5
4 8.66 22
5 8.86 22.5
6 9.06 23
6.5 9.25 23.5
7.5 9.45 24
8.5 9.65 24.5
9 9.84 25
9.5 10.04 25.5
10 10.24 26
10.5 10.43 26.5
11 10.63 27
12 10.83 27.5
13 11.02 28
14 11.22 28.5
15 11.42 29
16 11.61 29.5
17 11.81 30
18 12.01 30.5
19 12.20 31
20 12.40 31.5