Big Feet Pjs Navy Fleece Footed Pajamas for Big Boys' Soft, warm fleece fabric, Fun footed design 100% polyestser fleece, Flame resistant Big Feet PJs brand Sizing Information: XS = 39-50 pounds, S = 51-64 pounds, M = 65-79 pounds, L = 80-100 pounds Length from neck to ankle: XS = 37 inches. S = 40 inches, M = 46 inches, L = 53 inches