Toddler sizes:
US 5M Toddler---Foot Length: 4.7"/12cm
US 6M Toddler---Foot Length: 5.1"/13cm
US 7M Toddler---Foot Length: 5.5"/14cm
US 8M Toddler---Foot Length: 5.9"/15cm
US 9M Toddler---Foot Length: 6.3"/16cm
US 10M Toddler---Foot Length: 6.69"/17cm
Little Kid sizes:
US 11M Little Kid---Foot Length: 7.09"/18cm
US 12M Little Kid---Foot Length:7.48"/19cm
US 13M Little Kid---Foot Length: 7.65"/19.5cm
US 1M Little Kid---Foot Length: 7.85"/20cm
US 2M Little Kid---Foot Length: 8.05"/20.5cm
US 3M Little Kid---Foot Length: 8.25"/21cm