The slippers fit true to size. They are made well, the sheepskin is very soft and there is lots of fur inside the slipper making it very comfortable. They fit snug enough, but very comfortable, and they don't slip off of my feet when I walk around as some slippers tend to do. There is no noticeable arch support but the slippers are comfortable none-the-less.I received the item at a discount in exchange for a review.