26 inner length 16.6cm

27 inner length 17.2cm

28 inner length 17.8cm

29 inner length 18.4cm

30 inner length 19cm

31 inner length 19.6cm

32 inner length 20.2cm

33 inner length 20.8cm

34 inner length 21.4cm

35 inner length 22cm

36 inner length 22.6cm

37 inner length 23.2cm