Made with 100% Real Leather. It is elastic and easy to wear. Since it is made of natural leather, it does not contain any harmful substances. Since leather is a natural and breathable material, your babies' feet can breathe without sweating and are protected in a healthy way. It is completely handmade and made of first class genuine leather. (It is 100% leather, including the inner lining.) All pediatricians recommend that İlkadım shoes should be preferred with flat soles. İlkadım Deriza Baby Moccasins are produced with flat soles and we prefer soft leather for sensitive baby skin. Deriza Baby Moccasins, made of soft and natural leather, support your baby's first steps safely. According to the measurement from toe to heel, if the foot length is 10 cm, size 17 (for 3-6 month babies). If the foot length is 11 cm, size 18 (for 6-9 month babies). If the foot length is 11-5 cm, size 19 (for 9 months). -For 12 month babies) If the foot length is 12 cm, size 20 (for 12-16 month babies) If the foot length is 12-5 cm, size 21 (for 16-20 month babies)