Please note that this is a guide only and sizes may vary from brand to brand.
 
AU/UK US  EU
2 3 35
2.5 3.5 35.5
3 4 36
3.5 4.5 36.5
4 5 37
4.5 5.5 37.5
5 6 38
5.5 6.6 38.5
6 7 39
6.5 7.5 40
7 8 41
7.5 8.5 41.5
8 9 42
8.5 9.5 42.5
9 10 43
9.5 10.5 43.5
10 11 44
10.5 11.5 45
11 12 46
11.5 12.5 46.5
12 13 47
12.5 13.5 47.5
13 14 48
13.5 14.5 48.5
14 15 49
15 16 51
16 17 53
17 18 55