The YIHAKIDS shoes are made of genuine leather and shipped with a box, perfect for baby crawling and learning to walk, the suede bottom provides a good grip when the baby pulls up to stand. If the size you purchase is a little big, please don't worry, baby will soon grow into them, we always suggest customer to purchse the shoes with a tiny bit room left to grow, because baby's feet are growing everyday, and the feet are so soft, if you put on the shoes in a just right size, they will restrict baby feet grow. The shoes are recommended by many parents, perfect for house wearing or light outdoor flat ground. With this soft and lightwerght shoes, baby will keep on playing and barely pay any attention to the shoes. And parents have no issues with finding baby footwear:). Size details: S = 0-6 Months = 12cm/4.7in sole length = US size 4.5-5 M = 6-12 Months = 13cm/5.1in sole length = US size 6-6.5 L = 12-18 Months = 14cm/5.5in sole length = US size 7-7.5 XL = 18-24 Months = 15cm/5.9in sole length = US size 8-8.5 XXL = 24-36 Months = 15.7cm/6.2in sole length = US size 9-9.5 Note: * The age is just as a reference, please choose the size by measuring your baby feet length. *Please use a wet cloth to clean the shoes, no machine wash. *All of our leather is chemical free.