The size I ordered was 6-7. While the slippers dont have a size on them, I'm highly doubtful that they are the size I ordered, but as I have no way to prove it, I'm stuck with them. My son wears a 5-6, and these things are so snug that I'll be lucky if he wears them for a month. The googly eyes on the slippers are really quite cute, but they are haphazardly glued and are being torn off by my 15 mo old son. The slipper is soft and he loves wearing them - I just hate that he won't be able to wear See full review