The overall size of this two-piece outdoor chair cushion is 42 x 21 x 4 inches, and the cushion and backrest are both 21 x 21 x 4 inches. Before purchasing, it can be measured to ensure the fit. It is made of high-durability polyester fabric, which is waterproof, anti-fouling and anti-fading, durable in color and suitable for indoor and outdoor use. The interior is filled with PP cotton and broken sponge, which is comfortable to rebound. With fixed straps and quilting technology, it can effectively prevent slipping and prevent the filler from caking. Clean and convenient, just wipe with mild soapy water and air dry. The product is vacuum-packed, slightly flat and wrinkled after unpacking, and can be fluffy and full after standing for a few days.