Elastic at the opening makes the shoes easy to put on, easy to take off, and most importantly: they stay on your child?s foot.; Our soft-soled moccs are made with 100% durable, wear-tested leather and are suitable for infants and toddlers alike.; SIZE AGE INCHES 0 0-3 MOS 3.5" 1 6 WKS-6 MOS 3.6" 6-12 MOS 4.45" 3 12-18 MOS 4.85" 4 1.5-2 YRS 5.3" 5 2-2.5 YRS 5.7" 6 2.5-3 YRS 5.97" 7 3-3.5 YRS 6.35" 8 3.5-4 YRS 6.6" 9 4-4.5 YRS 6.95".