Sizing:
Infant/XXS 0-3 Toddler
Extra Small 3-6 Toddler
Small 7-10 Toddler
Medium 10-13 Toddler/Kids
Large 1-7 Big Kids/Womens 4-10/Mens 4-8

Sizes Infant/XXS, Extra Small, Small + Medium have logo grips on the bottom of the feet and size Large has a stitched logo on the bottom of the feet.