Can you actually tell a girl's shoe size from her age? Well, you can never tell the exact shoe size from age (shoe size/ feet size is individual!). But you can get a fair indication. So this Girls' Shoe Size by Age Size Chart is a useful tool when buying shoes Online (see Online shoe shopping tips) or when buying shoes as a gift (make sure they can be returned!)
But please note: all sizes are approximations only. They are not recommended for proper sizing.