Dear Customer : Thanks a lot for choose Here are some tips about size before you buy it, Please choose the shoes size according to your foot length, NOT insole length. If your feet is wide or thick, please choose a larger shoes size. Before choose your size , you'd better measure your feet length. How to Measure Feet Length Please measure your feet length carefully, with the method of the picture below: SIZE LIST Foot length 22.5.0(cm) = You should choose Size 36 Foot length 23(cm) = You should choose Size 37 Foot length 23.5(cm) = You should choose Size 38 Foot length 24(cm) = You should choose Size 39 Foot length 24.5(cm) = You should choose Size 40