Official website New Balance URC42LA children's autumn and winter lace-up buckle children's shoes size chart. Measuring the foot length is the key to choosing a size. Different brands and different series of shoes will have different shoe sizes. Be sure to measure the baby's foot length and compare the foot length with the size chart. [Reference Suitable Foot Length] Choose the number of sizes your child’s foot length will change at 3 months old. Spend an extra minute choosing the size and save a week of changing sizes, NB