the only criterion is barefoot length.
if foot is wide, choose bigger size.
CHECK SIZES:
Size 4.5 = Barefoot Length 22.1- 22.5cm
=EUR Size 35
Size 5 = Barefoot Length 22.6- 23cm
=EUR Size 36
Size 5.5 = Barefoot Length 23.1- 23.5cm
=EUR Size 37
Size 6 = Barefoot Length 23.6- 24cm
=EUR Size 38
Size 6.5 = Barefoot Length 24.1- 24.5cm
=EUR Size 39
Size 7 = Barefoot Length 24.6- 25cm
=EUR Size 40
Size 7.5 = Barefoot Length 25.1- 25.5cm
=EUR Size 41
