I have huge feet, so it is very difficult for me to find slippers which fit comfortably.  I own these slippers in the largest size they make, men's size 14-15, and I find them to be uniquely comfortable yet snug.  They are warm in the winter but also very comfortable when the weather is hot.  I have just purchased my second pair, and I will continue to buy these slippers as long as they keep making them in my size.