M.E.
Hey M., I would think that as long as she is doing everything that she is supposed to be doing developmentally she is alright. My youngest is now 5 and she has tiny feet. The thing is sometimes it depends on the shoes. She can wear anywhere from a size 9 to 12. But it seemed like it took forever for her to get into bigger sizes. If you are worried about her development ask your doctor, he or she should be able to help you out with those feelings.