Sizeexplain:Please contact me if you need to change the shoe size.

9M-12M: shoe size 21. Inside length of shoes12cm(5.1 inches)

18M-24M: shoe size 23. Inside length of shoes14cm(5.5 inches)

3T: shoe size 25. Inside length of shoes15.2cm(5.9 inches)

4T: shoe size 27. Inside length of shoes16.2cm(6.5inches)