US size:5 =China SIZE 35=inner length 22.5cm
US size :5.5 =China SIZE 36=inner length 23cm
US size:6 =China SIZE 37=inner length 23.5cm
US size:6.5 =China SIZE 38=inner length 24cm
US size:7 =China SIZE 39=inner length 24.5cm
US size:7.5 =China SIZE 40=inner length 25cm
US size:8 =China SIZE 41=inner length 25.5cm
US size:8.5 =China SIZE 42=inner length 26cm
US size:9 =China SIZE 43=inner length 26.5cm
US size:10.5 =China SIZE 44=inner length 27cm