UK/SA sizes CM US sizes  Inches  Euro sizes
3 11.7 4 4 5/8 19
4 12.5 5 4 7/8 20
5 13.4 6 5 5/16 22
6 14.2 7 5 5/8 23
7 15.0 8 5 7/8 24
8 15.7 9 6 3/16 25
9 16.5 10 6 1/2 27
10 17.3 11 6 13/16 28
11 18.2 12 7 3/16 30