16.8cm inside size 26

17.5cm inside size 27

28 yards inner length 18.2cm

29 yards inner length 18.8cm

19.3cm inside size 30

Length within 31 yards 19.8cm

32 yards inner length 20.5cm

33 yards inner length 21cm

34 yards inner length 21.5cm

35 yards inner length 22cm

36 yards inner length 22.5cm

37 yards inner length 23cm

38 yards inner length 23.5cm