This is a perfect replacement cover for patio swing seat. Great replacement seat cover for swing chair that replace torn existing seat cover and transform your old outdoor swing.Swing Seat Cover Size 1: (L) x (W) 58.26 x 41.33 inch -- (19.68 inch seat +21.65 inch backrest ) Swing Seat Cover Size 2: (L) x (W) 54.33 x 41.33 inch -- (19.68 inch seat +21.65 inch backrest ) Swing Seat Cover Size 3: (L) x (W) 44.49 x 38.97 inch -- (18.50 inch seat +20.47 inch backrest )How do you measure to make sure of correct size. 1. You could measure the old fabric cover. 2. You could measure the swing seat frame.How do you fit it. You have to unscrew where seat fits on frame then slide the old seat cover off, replace the new one and put screws back in.Package Included: 1 x Replacement Seat Cover for Swing Chair