When shopping for shoes, I always look for a review that advises as to whether they're true to size.  I wanted to leave my feedback about this slipper:  I wear an 8 in every shoe I own.  Based on other reviews I decided to order a large in this one.  It fits fine because it's a stretchy shoe that naturally hugs your foot.  That being said, I think I could have also been happy in a medium, because I have about a half inch to spare when comparing my foot to the sole of the shoe.  Either way, it's a great little slipper for the price.