26 inner length 16.5cm

27 inner length 17cm

28 inner length 17.5cm

29 inner length 18cm

30 inner length 18.5cm

31 inner length 19cm

32 inner length 19.5cm

33 inner length 20cm

34 inner length 20.5cm

35 inner length 21cm

36 inner length 21.5cm

37 inner length 22cm