The size chart of this style is as follows:
----US Size------:----Label Size----- Inside Length ---
----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 ----------
----12.5 M Little Kid--:--31------------- 19 cm ----------
----13 M Little Kid---:---32------------- 19.5 cm --------
----13.5 M Little Kid--:--33------------- 20 cm ----------
----2 M Little Kid----:---34------------- 21 cm ----------
----2.5 M Little Kid--:---35------------- 21.5 cm ----------
----3 M Little Kid----:---36------------- 22 cm ---------