These Baby Sandals are made of Genuine Leathers. They are good from 3 months old to 2 Years Old. ? DURABLE NON-SLIP SOLES that are GOOD FOR FOOT DEVELOPMENT. They are made with Soft Wave Pattern Rubber Soles. ? PREMIUM QUALITY GENUINE LEATHER. They are made with Buttery Soft leather with flexibility. The Collar for this Style is Not Supportive. They are Wonderful if you prefer a tender touch on your kid's feet from toe to heel. ? COMFORT - Soft Collar and Padded Insoles that provide extra comfort to walk outdoor. ? SHOES STAY ON BABIES' FEET. They come with Adjustable Buckle and Belt closure. ? SAFETY IS OUR TOP PRIORITY. The materials we use are audited and safe for children. ? These sandals run slightly smaller than our Mary Janes and signature moccasins. To ensure the best fit, please measure the kid's foot first. Add 5/8" (about 1.6 CM) to the foot length you just measured. Use the TOTAL and compare it with our Size Chart, and pick the nearest insole length (your TOTAL should not go over the Insole Length). Then see which size number it fall under. 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.