These were bought for my 6 year old son in the adult med.  He wears a youth size 1 1/2-2 and they are tight enough around the ankle to keep it easily on his foot, yet plenty of room to grow.  My son loves tigers and his face was priceless when he open these CHRISTmas morning!  They are very soft and comfy.  They had a small tear right at the seam of the heel on one of the slippers after a few wears but it was easily fixable and I'm not that good with a thread and needle(just your basic button and tears.  These were a hit as well as the grizzly slippers bought for my 8 year old.  Worth the money but $10 less would have made them the purrrfect purrrchase(sorry, I couldn't help myself) wink wink