Sold by piece (not a set): The sofa cover is made of cotton fabric and polyester filling, which is soft and smooth to the touch and not easy to accumulate hair or pet hair. Please refer to our measurement guide and measure your furniture before ordering, sold by piece but not in a set, suitable for your adjustable sectional sofa and couch. How to Choose: It is recommended to choose 28" width to fit sofa width equal to or less than 24", 36" width to fit sofa width between 24" and 32", 43" width to fit sofa width over 32". For length, please add extra 4" - 8" long to tuck in the sides, width and length are better to be longer than short. For example, your sofa size is 30" x 58", you can order 36" x 63" size to fit. Armrest and back size is recommended to choose 28" x 28" or 36" x 36". Multiple Functions and Applications: This soft furniture cover protects your sofa, couch, loveseat, recliner and chairs from spills, stains, pets. It is suitable for all seasons and can be used not only as a sofa cover, but also as a playmat, bedroom rug, floor mat, window sill mat, etc... SECURELY FIXED IN PLACE: Heavy quilted sofa cover with non-slip backing - silicone rubber design, it is more securely fixed in place than other ordinary sofa covers that use straps. Please note that minor adjustments are required if the dog is noisy. .. & Maintenance: These modular sofa covers are suitable for fabric and leather furniture, easy to install! No other accessories required! Easy to clean, machine wash (cold water) and tumble dry (cold water), do not bleach. Wash as good as new!