Size for Most Chairs: The total area of the chair cushion is 18(W) x 18(L) x 3.5(H) inches, there are four ties, please cut the ties according to the size of the chair. Set of Seat & Back Cushion：The size of the back cushion is an enlarged 18 x 28 x 3 inches, the fabric is made of linen and the core is filled with about 1.5 kg of cotton. High-Density Foam Material: Seat Cushion filling 3.5 inch High-Density Foam , no odor, provides better support, and sit for a long time without changing its shape. Linen Material: The indoor cushion is made of linen match the horseshoe-shaped design, suitable for most chairs, including wood/metal chairs, folding chairs, terrace chairs, game chairs, etc. Double Non-slip Design: Chair pad with Non slip bottom and attached ties keeps in place absolutely. Won't be worried about the cushion slide during using. 【KGPLOME Guarantees 60-day money-back】: We are committed to providing the best service, if you are unsatisfied, you can contact us. Please note: The cushion is vacuum compressed and will take 24 hours to return to its original condition 【Size for Most Chairs】The total area of the chair cushion is 18(W) x 18(L) x 3.5(H) inches, there are four ties, please cut the ties according to the size of the chair. 【Set of Seat & Back Cushion】： The size of the back cushion is an enlarged 18 x 28 x 3 inches, the fabric is made of linen and the core is filled with about 1.5 kg of cotton.