US Europe UK Mexico Inches cm
4 34 2 1 8.3 21
4.5 34.5 2.5 1.5 8.5 21.5
5 35 3 2 8.7 22
5.5 35.5 3.5 2.5 8.9 22.5
6 36 4 3 9.1 23
6.5 36.5 4.5 3.5 9.3 23.5
7 37 5 4 9.4 24
7.5 37.5 5.5 4.5 9.6 24.5
8 38 6 5 9.8 25
8.5 38.5 6.5 5.5 10 25.5
9 39 7 6 10.2 26
9.5 39.5 7.5 6.5 10.4 26.5
10 40 8 7 10.6 27
10.5 40.5 8.5 7.5 10.8 27.5
11 41 9 8 11 28
11.5 41.5 9.5 8.5 11.2 28.5
12 42 10 9 11.4 29
12.5 42.5 10.5 9.5 11.6 29.5
13 43 11 10 11.8 30