First, the bad. I wear an 8.5 med and purchased these in the same size even though other reviews said they run big. I suppose they do run large by a little as I am able to wear my thick wool socks with them. Even though they are long enough for my toes, they smush down on top of my big toenail. If I wear them for long or walk much in them, it causes the top of my big toe to become sore. However, I actually purchased them to wear into town when there is snow or rain so they will work as long as I'm not doing a lot of shopping for hours thru a mall or something like that. Also, there is not much arch support so if someone needs that,they would have to add an orthotic of some kind. The good is they look cute and hopefully are waterproof.