Our Baby / Toddler T-Bar Shoes are made of premium quality leather with a t-strap cut out. • Made of PREMIUM QUALITY GENUINE LEATHER. • THE SHAPES OF OUR SHOES STAY. The structure won't collapse. • Durable Soles: leather plus diamond grip pattern non-slip rubber. Soft and flexible that are good for foot development. • SHOES STAY ON BABIES' FEET - Buckle and Belt Closures on the sides. • COMFORT - Cushioned Collar Padded Insoles for walking outdoor. • SAFETY ARE OUR TOP PRIORITY. The materials we use are audited and safe for children. Please refer to Sizing Guide Photos for sizing help. Make sure to add at least 3/8 inches (or 1 CM) of room for baby's foot development. Age is for references in general, it's recommended to measure the kid's foot plus 3/8" and pick the size accordingly. For example, some 7 months old baby girls are still in size 2. Some 18 months old boys may wear size 5 to 6 already.