I am disappointed  in this slipper.  I normally wear a size 7 in shoes and slippers so I went with medium since it said size 7-8.  I know the reviews stated this slipper runs small and tight, well it does.  I should of got the large. I regret buying these and it hurts the top of my right foot. I keep trying to wear them to stretch the slipper but it hurts too much.  They are also to tight in the toe area. I should of kept the packaging to mail them back.  I do remember now that I use to wear Dearfoams all the time and at some point, they started to run small so I switched to another brand.  If you do buy these slippers, buy a size up.  They look nice and cozy and they are pretty warm and have a nice non-skid bottom. Though, I am not go re-purchase a large since they may be too big and I could trip or have an issue on the stairs. But they are priced fine and arrived quickly.
Update: I did order another pair in the large and I am happy I did.  They are in the chestnut color since that is the only color choice available. They fit great and are super comfy, warm and sturdy.  However, they cost slightly more then my first pair and not sure why that is and I can not send the first pair back so I spent almost $40 on these slippers. Definitely by one size larger then your shoe size.