it is not standard US size.Please decide the shoes size according to your foot length or your shoes inside length,please do not decide the size  by Google or The size standard in your country.For Example:  If you choose US 7. we will send size 38. it comes with 24cm insole length  If your feet are fat. you may choose the bigger onefoot length range               shoes insole length       US     EUR22.1～22.5cm(8.70～8.86 in)      =22.5cm(=8.86 in)        =4.5   =35 22.6～23cm(8.90～9.06 in)       =23cm(=9.06 in)          =5.5   =36 23.1～23.5cm(9.09～9.25 in)     =23.5cm(=9.25 in)        =6     =37 23.6～24cm(9.29～9.45 in)       =24cm(=9.45 in)          =7     =38  24.1～24.5cm(9.49～9.65in)      =24.5cm(=9.65 in)        =8     =39 24.6～25cm(9.69～9.84 in)       =25cm(=9.84 in)          =8.5   =40 25.1～25.5cm(9.88～10.04 in)    =25.5cm(=10.04 in)       =9.5   =41 25.6～26cm(10.08～10.24 in)     =26cm(=10.24 in)         =10    =42 26.1～26.5cm(10.28～10.43 in)   =26.5cm(=10.43 in)       =10.5  =43(allow 2-3mm differs)Notice:1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures.2. Please allow 1-3cm measuring deviation due to manual measurement.