Bought these for my teenage son to wear around the house in the winter.  It's hard to find "man" slipper socks that are kinda cool for a teenager.  He really likes these.  They look good, sort of sporty, and they stay put on his feet.  I bought the burgundy and black; some of the other colors would probably work better for females.  He wears a size 9 1/2-10 shoe, and the size large sock fits him fine.