14.5cm inside size 23

15.0cm inside size 24

15.5cm inside size 25

16.0cm inside size 26

16.5cm inside size 27

17.0cm inside size 28

17.6cm inside size 29

The inner length of size 30 is 18.2cm

The inner length of size 31 is 18.5cm

19.0cm inside size 32

The inner length of size 33 is 19.7cm

Inner length of size 34 20.4cm

The inner length of size 35 is 21.0cm