Another consideration when buying your girls running shoes is socks. If you are going to be wearing socks with your trainers, then you need to take this into consideration as well, how will the shoes fit when you are wearing socks? You may need to buy a slightly bigger shoe than normal if the socks are thick, but if you do, the shoes may be too big if you decided not to wear socks with them. Thinner socks may be ok though.