TANZKY&reg; Baby Boys' Swim Diaper (Star) 50% Nylon/50% Lycra Handwash One size: 6- 24 months baby. 4 Button Size Can Be Adjusted, Don't worry about age. Front waistband long 9 inches, back waistband long 15 inches, long pants 7 inches, fit waistline 15-21 inches Waterproof material, prevent the baby urine leakage, Never worry about swimming environment. Package including: 1PCs swim diaper Reusable