India/UK US Europe Foot Length(in cm)
2.5 4.5 35 22.90  - 23.37
3.5 5.5 36 23.40 - 24.04
4 6 37 24.06 - 24.70
5 7 38 24.75 - 25.36
6 8 39 25.40 - 26.02
6.5 8.5 40 26.05 - 26.68
7.5 9.5 41 26.70 - 27.34
8.5 10/11 42 27.37 - 28.00