I purchased this shoes for my 3 years old girl, she has the old one through friend's daughter, has been worn out, so try to get her new pair, on the bottom of shoes show #11, but When I received the shoes I found it look like 10 years old size shoes(the bottom of shoes show #3, with #1 sticker cover it) now I don't know what to do, can I exchange to the size I need?