US 5   = CN 35 = foot length 22.5cm 

    US 5.5 = CN 36 = foot length 23cm 

    US 6   = CN 37 = foot length 23.5cm

    US 6.5 = CN 38 = foot length 24cm

    US 7   = CN 39 = foot length 24.5cm

    US 7.5 = CN 40 = foot length 25cm

    US 8   = CN 41 = foot length 25.5cm

    US 8.5 = CN 42 = foot length 26cm

    US 9   = CN 43 = foot length 26.5cm

    US 9.5 = CN 44 = foot length 27cm