Kids grow like weeds, so don’t rely on going right to the next size after your child outgrows his shoes. He might skip a size or two. If you’re buying shoes online or giving the information to grandma, for example, you’ll need to figure out your child’s shoe size on your own. Ill-fitted shoes can cause several issues. In children, shoes that are too big or too small can cause your child to fall more often, get blisters or suffer from ingrown toenails. Therefore, you’ll want to find your child’s exact shoe size.
Take off your child’s shoes in the evening when the feet are at their biggest. If the shoes are to be worn with socks, keep them on. Otherwise, take off the socks.
Set two pieces of paper on the ground and have your child stand with one foot on each paper. Trace the exact outline of both feet on the sheets of paper. If your child cannot stand, sit him on your lap and have a second person trace his foot. Use a book or another hard surface so you can straighten his feet out as best as possible.
Measure the length between the topmost and bottommost points in inches. Use the largest measurement to find the best shoe size.
Compare the results to the shoe chart for the brand or shoe store of choice. In general, shoes sizes are standard. A child with a foot that is 6 inches long will typically wear a size U.S. 8 1/2 shoe, no matter the brand or store. For every 1/4 to 1/8 inch in growth, expect the shoe size to increase by 0.5.