Sizing:
Infant 0-3 Toddler Shoe Size
Extra Small 3-6 Toddler Shoe Size
Small 7-10 Toddler Shoe Size
Medium 10-13 Toddler Shoe Size
Large 1-7 Kids Shoe Size/Womens 4-8/Mens 4-6 Shoe Size
Sizes Infant/XXS, Extra Small, Small + Medium have "Heartbreaker" grips on the bottom of the feet and size large have a stitched "Heartbreaker" on the bottom of the feet.