Review on Water Resistant Reversible Sofa Slipcover Furniture Protector with 2-Inch Wide Elastic Straps - Couch 🛋️ Cover for Pets and Kids - Fits Sofas with Sitting Width Up to 66 Inches - Gray/Beige by Patricia Davis

There are several sizes. I tried the standard sofa size for my regular 60 inch sofa and it barely fit. The front of the pillow hangs forward about 4-6 inches and the armrests were barely covered. We bought a very large one and it fits better. hangs further back, on the armrests and down the front. Not sure what type of sofa the large one was made for, but a very large one offers a lot more coverage. Anything over 50 inches would be extra large. Large cover for our love seat and it fits better but still doesn't have the armrests and front cover that the Extra Large has. I may need to look at a larger version of the loveseat to cover my favorite full size chair. In addition, the strap is pulled together on the back with a clasp. You need to make the attachment point more rigid. A very good product for the size.