I bought these hoping to use the during the cold NYC winters. I ordered a size up, as I've found that these types of booties are tight, and that size fit me well. I ordered a 9-10 when I'm usually a 7-8 in open slippers. However, I didn't like the way they felt. The sole is a fairly thin fabric, so I could feel anything that was on the floor. We have wooden floors so at times that could be a bit unpleasant. They were also a bit slippery, and I wound up putting them under my bed just in case and buying a pair of Elizabeth Arden spa slippers with a thick rubber sole.