Muck Boot Breezy Mid Multi Purpose Boot (Toddler/Little Kid/Big Kid) 100% Rubber Rubber sole Shaft measures approximately 7.5" from arch Heel measures approximately 1.25" Boot opening measures approximately 12" around 100% Waterproof 3 mm CR Flex-Foam with PK Mesh Lining Wide Opening Slips On Easily Durable Rubber Exterior Bright, Fun Colors