The American Podiatric Medical Association advises parents to use their heads focusing on their child’s comfort when considering a purchase of shoes rather than style and fashion exclusively.
These are their suggestions:
* Shop later in the day. Feet expand when bearing weight, so they tend to swell throughout the day. Therefore, it's best to buy shoes in the afternoon or evening, when your children's feet have already increased in size.

* Always measure the feet. Every shoe fits differently, and sizes tend to vary by style and brand.

* Take socks. If your children aren't wearing socks already, take a spare pair. It's important that your children try on shoes with the same type of socks or stockings they'll wear with the shoes.

* Examine the shoes for quality. First, check the heel to make sure it is stiff. Press on both sides of the heel; it should not collapse. Then, check toe flexibility. The shoes should bend with the toes; they shouldn't be too stiff or bend too much. Finally, look to see if the shoe is rigid in the middle. It should not twist.

* Buy for the larger foot. It is common for one foot to be larger than the other, so be sure the shoes fit both feet comfortably.

* Choose shoes that do not need a "break in" period. The shoes you buy should be comfortable immediately. If the shoes are too tight or pinch the toes, your children could wind up with corns, calluses or blisters.
For more information from the The American Podiatric Medical Association http://www.apma.org/s_apma/index.asp