Woo-hoo. Finally got a pair that fit. Originally ordered the X-Large, but they would not even stay on my feet. Sent them back and ordered the medium, and they arrived today. I am a male with a 10.5 - 11 shoe size. The medium's fit me perfectly, just like a sock does. No extra room at the toes, which is what I wanted. Before and after bed, I wear an oversized T-shirt, Thai fisherman's pants - and now these. Hard to believe I paid almost $30, but I wanted something dedicated for slopping around the house - especially when it's cold.
They are warm without being too hot, and nice to the touch.  The material could've been a little thicker in my opinion, but definitely won't be wearing them in the summer. The little "grippy's" on the bottom - really DO grip. There are 2 very stiff tags which I'll be removing "very carefully" with a razor blade.
 Overall, happy with the purchase. I left off 1 star for the price.