Size Choose:1, Our size is not standardUSsize, and it is only equal to foot length!2. The size standards from different countries and different manufacturers are different, your foot length is the only criterion for choosing size.3. Foot length is not insole length, and it is also not the shoes inside length. Normally, Inside length < foot length4. Please measure your foot length carefully. Method is showed on the pictures below.5. Please choose the size according your foot length!EU Size35=US4.5 =Foot Length22.1- 22.5cmEU Size36=US5 =Foot Length22.6- 23.0cmEU Size37=US5.5 =Foot Length23.1- 23.5cmEU Size38=US6 =Foot Length23.6- 24.0cmEU Size39=US6.5 =Foot Length 24.1-24.5cmEU Size40=US7 =Foot Length 24.6-25.0cmEU Size41=US7.5 =Foot Length 25.1-25.5cmEU Size42=US8 =Foot Length 25.6-26.0cmEU Size43=US8.5 =Foot Length 26.1-26.5cmEU Size44=US9 =Foot Length26.6- 27.0cmEU Size45=US9.5 =Foot Length 27.1-27.5cmEU Size46=US10 =Foot Length 27.6-28.0cmEU Size47=US10.5 =Foot Length28.1- 28.5cmEU Size48=US11 =Foot Length28.6- 29cm About Drop