Muck Boot Rover Ll Kids' Rubber Boot Synthetic Rubber sole Shaft measures approximately 10" from arch Heel measures approximately 1.75" Platform measures approximately 0.75" Boot opening measures approximately 14" around 5 mm neoprene provides comfort and flexibility, along with excellent waterproofing, shock absorption and heat retention properties; adjusts to the shape of little feet to resist blisters and chafing High-grade rubber exterior provides extra toughness and makes for a 100% waterproof kids' boot Lightweight and breathable mesh lining keeps feet well ventilated for long-wearing dryness; comfort rated from subfreezing to 65 F/18 C Self-cleaning diamond outsole Rubber toe and heel protectors extend the life of the boots