US UK EU
7.5 7 40 2/3
8 7.5 41 1/3
8.5 8 42
9 8.5 42 2/3
9.5 9 43 1/3
10 9.5 44
10.5 10 44 2/3
11 10.5 45 1/3
11.5 11 46
12 11.5 46 2/3
12.5 12 47 1/3