Size 6.5=38  fit for foot length is 24.5cm.
Size 7=39     fit for foot length is 25cm.
Size 7.5=40  fit for foot length is 25.5cm.
Size 8=41     fit for foot length is 26cm.
Size 8.5=42  fit for foot length is 26.5cm.
Size 9.5=43  fit for foot length is 27cm.
Size 10=44   fit for foot length is 27.5cm.
Size 11=45   fit for foot length is 28cm.
Size 12=46   fit for foot length is 28.5cm.