Foot length 22.5(cm) = Euro 35 = You should choose USA 5
Foot length 23.0(cm) = Euro 36 = You should choose USA 6
Foot length 23.5(cm) = Euro 37= You should choose USA 6.5
Foot length 24.0(cm) = Euro 38 = You should choose USA 7.5
Foot length 24.5(cm) = Euro 39 = You should choose USA 8.5
Foot length 25.0(cm) = Euro 40 = You should choose USA 9
Foot length 25.5(cm) = Euro 41 = You should choose USA 9.5