16cm inside size 26

16.6cm inside size 27

17.3cm inside size 28

17.9cm inside size 29

The inner length of size 30 is 18.5cm

The inner length of size 31 is 19.1cm

The inner length of size 32 is 19.8cm

20.4cm inside size 33

21cm inside size 34

21.6cm inside size 35

22.2cm inside size 36

22.8cm inside size 37

26-30 yards, 5 pairs in one hand

31-37 yards, 7 pairs in one hand