This Kensington Garden Outdoor Seat/Back Combination Chair Cushion is the perfect complement to your outdoor furniture. It comes with four string ties to securely attach cushions to outdoor chairs. Eight circle tacks give the cushion dimension and a full appearance, while preventing cushion fill from shifting and bunching. The cushion's 100% heavy-duty polyester fabric is fade, stain and water resistant. The cushion's plush polyester fiber fill is made from 100% recycled, post-consumer plastic bottles, and overstuffed for added comfort, strength and durability. A variety of color and pattern options are available to coordinate with your outdoor decor.Overall cushion length: 42 inchesOverall cushion width: 21 inchesOverall cushion thickness: 5 inchesSeat cushion depth: 21 inchesBack cushion height: 21 inches