I had R's foot measured at striderite and was told she was a 3. However I had her try on a pair of 0-6 month pedipeds and they fit her perfect. I held her foot up to a pair of size 3 soft sole converse and they were much bigger than her foot. She also wears 0-6 robeez. So my question- do striderite run small? Am I doomed to only buying in store? Help!