Material: Our Over Knee High Socks are made of high-quality material. Breathable and soft, natural and skin-friendly, light and durable, full and thick. Soft tube socks are best choice for babies and toddler with delicate skin. | Size: Baby Knee High Socks have 2 sizes, Size "S": Sole Length (before stretched): 3.9 inch, Typical Age 0-1 Years; Size "M": Sole Length (before stretched): 4.7 inch, Ty