Sizes:

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, Extra Small, Small, Medium have logo grips on the bottom of the feet Large have a stitched logo on the bottom of the feet.