Size number here is totally different from shoe size chart in your country, but your bare foot length would never change , so you must measure your bare foot with a ruler , then choose size with chart below .
Pls choose the shoes size refer to your Foot Length.
Foot length < Insole Length < Outsole Length
The Insole length longer than Foot length about 1-1.5cm
US size 7 = EU size 39 Fit Foot Length 24.5 cm
US size 7.5 = EU size 40 Fit Foot Length 25 cm
US size 8 = EU size 41 Fit Foot Length 25.5 cm
US size 8.5 = EU size 42 Fit Foot Length 26 cm
US size 9 = EU size 43 Fit Foot Length 26.5 cm
US size 9.5 = EU size 44 Fit Foot Length 27 cm