Size is very important for healthy development of your childs feet. Please measure carefully to select the correct size.
Wiggle those toes - tight clothes, socks, or covers can restrict movement; instead, keep feet loosely covered. Try to stand your child up to measure if possible, allow roughly an extra 1cm (1/2 inch) when choosing a size.
Measure often - on average, your child's feet will grow two sizes a year until age four or five. Be sure to measure feet regularly to ensure a proper fit.
Be patient - as exciting as those first steps are, your child will walk when he or she is physically and emotionally ready. Most children learn to walk between nine and 18 months. If your child is still not walking by 18 months, have a discussion with your pediatrician.