If your foot measures 24.5cm, Please choose size 6.5 = French correspondence size 38 If your foot measures 25cm, Please choose size 7 = French correspondence size 39 If your foot measures 25.5cm, Please choose size 7.5 = size of French correspondence 39.5 If your foot measures 26cm, Please choose size 8 = French correspondence size 40.5 If your foot measures 26.5cm, please choose size 8.5 = French correspondence size 41 If your foot measures 27cm, please choose size 9.5 = French correspondence size 42 If your foot measures 27.5cm, Please choose size 10 = French correspondence size 42.5 If your foot measures 28cm, please choose size 11 = French correspondence size 43-43.5 If your foot measures 28.5cm, please choose size 12 = French match size 44 If your foot is 29cm, please choose size 13 = match size Française 45 If your foot measures 29.5cm, please choose size 14 = French match size 45.5 Please note that here are two different models