I was glad that I read the other reviews and bought these a size larger than I otherwise would have.  I wear a 7 normally and they are a good fit at 8-9. The elastic at the back of the heel keeps them snug, and while it doesn't show in the picture, they have nice little "handles" at the back that you can use to pull them on.  They are very comfortable and warm, and look much more foot-shaped on your foot than they do in the illustration.  I am thinking of giving these for Christmas gifts since nobody can have to many warm fuzzy things during the winter months.