26 yards/inner length 17.2cm

27 yards/inner length 17.8cm

28 yards/inner length 18.5cm

29 yards/inner length 19.2cm

30 yards/inner length 19.8cm

31 yards/inner length 20.5cm

32 yards/inner length 21.2cm

33 yards/inner length 21.8cm

34 yards/inner length 22.3cm

35 yards/inner length 22.8cm

36 yards/inner length 23.3cm

37 yards/inner Length 23.8cm

38 yards/inner Length 24.3cm

39 yards/inner length 24.8cm

40 yards/inner length 25.3cm

41 yards/inner length 25.8cm

42 yards/inner length 26.2cm

33-42 code number is relatively normal

Select by internal length, there is no big or small