Size Info:
8.5 M US Toddler = Fits foot length 6.31 (in) / 16.0 (cm)
9 M US Toddler = Fits foot length 6.57 (in) / 16.7 (cm)
10 M US Toddler = Fits foot length 6.83 (in) / 17.3 (cm)
11 M US Toddler = Fits foot length 7 (in) / 18.0 (cm)
11.5 M US Toddler = Fits foot length 7.35 (in) / 18.6 (cm)
12.5 M US Little Kid = Fits foot length 7.61 (in) / 19.3 (cm)
13.5 M US Little Kid = Fits foot length 7.87 (in) / 20.0 (cm)
1 M US Little Kid = Fits foot length 8.12 (in) / 20.6 (cm)
2 M US Big Kid = Fits foot length 8.38 (in) / 21.3 (cm)
3 M US Big Kid = Fits foot length 8.64 (in) / 21.9 (cm)
3.5 M US Big Kid = Fits foot length 8.90 (in) / 22.6 (cm)