Size Information (length before stretching):S (0-12 Month): Length of Sole: 3.5-4" Size of Shoes: 1-4M (1-3T): Length of Sole: 4-4.7" Size of Shoes: 4-9L (3-5T): Length of Sole: 4.7-5.5" Size of Shoes: 9-11Product Advantage:?Grip socks for age 1-12 months /12-36 months /3-5 years.?High quality cotton oddler socks material and soft touching.?Anti-slip design socks with grips for kids to wear and play safely.?Multi colors in a pack, an ideal choice for Birthday / Christmas gift.? Maximum comfort, provide warmth and protections during sleep and play time.?Elastic and stretchable for better fit, fresh colors for all year wear, mom's good choice.We hope you enjoy your purchase. If you are satisfied with our product or service, hope you can share with others!