The size chart of this style is as follows:
----US Size------:----Label Size----- Inside Length ------
----6 M Toddler----:------21------------- 13.5 cm ---------
----6.5 M Toddler--:------22------------- 14 cm -------
----7 M Toddler----:------23------------- 14.5 cm ---------
----8 M Toddler----:------24------------- 15 cm---------
----8.5 M Toddler--:------25------------- 15.5 cm --------
----9 M Toddler----:------26------------- 16 cm ------
----9.5 M Toddler--:------27-------------16.5 cm ---------
----10 M Toddler---:------28------------ 17 cm -------
----11 M Little Kid--:----29------------- 17.5 cm ----------
----11.5 M Little Kid-:---30------------- 18 cm ----------