Dear Customer :Thanks a lot for choose our QIFENG brand 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.-------------------------------------------------------------------------------------------If You foot length is26.3CM, You'd better choose size43.-------------------------------------------------------------------------------------------How to Measure Feet LengthPlease measure your feet length carefully, with the method of the picture below: