I ordered a 5 my daughter is a 4.5. and they fit okay definetly some room for growth she will be needing a good thick sock with shoe upon wearing but that is fine, I feel this will last her through rain season.  My daughter loves them though they wear very cute. We ordered the pink with flower bottoms at sale price. Good purchase.  My daughter is weather proof and this will add to her items, just so she won't have to sit in her long rain boots all day in school here is another option.