size 21 (size 4US) : 14,5cm

size 22 (size 4.5US): 15cm

size 23 (size 5US): 15,5cm

size 24 (size 6US): 16cm

size 25 (size 7US): 16,5cm

size 26 (size 8US): 17cm

size 27 ( size 9US): 17,5cm

size 28 (size 10US): 18cm

size 29 (size 11US): 18,5cm

size 30 (size 12US): 19cm