Size and Color : Back Cushion Size: 21L 21W 4H inches,Seat Cushion Size:21L 21W 4H inches.Available in a variety of classic colors, you can choose any of them to match your outdoor patio furniture.Please allow +/- 1 inch measurement deviation exist due to manual measurement. Material Selection : The outdoor seat cushion is made of natural eco-friendly material,100% polyester fabric.The cloth is well UV-resistant,fade-resistant and waterproof. Friendly for your garden chairs, rocking chair, Adirondack chair and other standard indoor furniture. Soft and Comfortable : Filing material inside the seating cushion can absorb pressure and the polyester is also resilient. Overstuffed construction for extra comfort and longevity.Even sitting in a hard chair can provide a soft, comfortable feeling. Non-Slip : Attached ties keep outdoor cushion securely fastened to your outdoor patio furniture.Sewn circle tack construction prevents cushion fill from shifting and bunching.