Hi,Dear value customers!Please choose size according to the foot length, please do not use the insole length.For example,if your foot length (Heel to Toe) is 26.5cm, please choose size 8.5=42 in this model.

Size 6.5=38  fit for foot length is 24.5cm.

Size 7=39     fit for foot length is 25cm.

Size 7.5=40  fit for foot length is 25.5cm.

Size 8=41     fit for foot length is 26cm.

Size 8.5=42  fit for foot length is 26.5cm.

Size 9.5=43  fit for foot length is 27cm.

Size 10=44   fit for foot length is 27.5cm.

Size 11=45   fit for foot length is 28cm.