Inner length of shoe size 21 is 13.5cm

Inner length of shoe size 22 is 14.0cm

Inner length of shoe size 23 is 14.5cm

Inner length of shoe size 24 is 15.0cm

Inner length of shoe size 25 is 15.5cm

Inner length of shoe size 26 is 16.0cm

Inner length of shoe size 27 is 16.5cm

Inner length of shoe size 28 is 17.0cm

Inner length of shoe size 29 is 17.5cm

Inner length of shoe size 30 is 18.0cm

Inner length 18.5cm in size 31

Inner length 19.0cm in size 32

19.5cm inside size 33

Inner length 20.0cm in size 34

20.5cm inside size 35

Inner length 21.0cm in size 36

21-25 yards, 5 pairs in one hand

26-30 yards, 5 pairs in one hand

31-36 yards, 6 pairs in one hand