Our Organic Cotton Gripper Booties offer GOTS certified 100% organic cotton interlock inside and out for extra comfort and softness at a lighter weight. Our signature two-snap secure fit helps them stay on even the most wiggly feet, putting an end to lost baby socks. Rubber grippers on the bottom help new walkers grip slippery floors when they start to take those momentous first steps. Available in a range of coordinating colors and prints that mix and match with other Zutano items. Details: Eco-friendly, GOTS certified 100% organic cotton; Machine Washable; Imported; Size Chart Size Fit Foot Length 3M 0 to 3 Months up to 3.25" 6M 3 to 6 Months 3.75" 12M 6 to 12 Months 4.25" 18M 12 to 18 Months 4.5" 24M 18 to 24 Months 5".