This particular cover fit my large sofa just right and on the border of fitting a bit snug.  Plenty of room to pull everything around the sofa, just close on the back width so measure carefully.  My sofa shape is exactly like the one in the pic, it is a King Hickory.    Nice quality fabric, wish I would have had more of a color choice but neutral is good.  The color I chose was more of a tan.   This Darby slipcover is comparable or even better than my other Surefit brand covers.