Sold by piece not set: The sofa cover is made of chenille, soft and comfortable to touch. Note: Sold by 1 piece, but not all sets, if you want your sofa to look like as advertised, you need to buy seat cover + armrest cover + backrest cover, suitable for your adjustable sectional sofa and couch. Multifunction and application: This soft furniture cover protects your sofa, couch, loveseat, recliner and chair from spills, stains, pets. This sofa cover can not only be used as a sofa cover, but also as a game mat, rug, bay window mat, etc. Easy to install and care: These sectional sofa covers are suitable for fabric and leather furniture, and are easy to set up! No other accessories are required! Easy to clean, machine washable (cold water) and dryable (cool), do not bleach. Like new after washing! How to choose: We offer a variety of sizes for you to choose, the size of the sofa cover is usually larger than the sofa cover so that it can be tucked into the back and sides of the sofa. The armrest and backrest size recommends choosing 27" x 27" or 35" x 35". If you have any questions about size selection or quality, please feel free to contact us. Secure: The back of the sofa cover is designed with silicone, which is more secure than ordinary sofa covers that use straps. Please note that minor adjustments are required for rowdy dogs and children.