14.8CM inside size 24

15.4CM inside size 25

16CM inside size 26

16.6CM inside size 27

17.2CM inside size 28

17.8CM inside size 29

18.4CM inside size 30

19CM inside size 31

The inner length of size 32 is 19.6CM

The inner length of size 33 is 20.2CM

Inner length of size 34 20.8CM

21.4CM inside size 35

22CM inside size 36

22.6CM inside size 37

The inner length of size 38 is 23.2CM