These are the cutest things I have ever seen ! However the way they fit my 15 month old were quite odd. She is currently in a size 3 shoe so I got her a size 4, hoping for a growth spurt by the summer / spring. But these shoes fit her PERFECTLY. I thought that she had already experienced the growth spurt and maybe I just needed to catch up. I ordered her a 4 in another pair of shoes and they were coming off of her feet ! I'm not familiar with Crocs so maybe they just run small. But I'm sad to say my baby girl probably won't be able to wear these come summer! & she loves them toooo much to return. So we'll hope for some spring weather soon in the DMV!!