The ARDEN Basics Outdoor Midback Dining Chair Cushion is made with long-lasting outdoor polyester fabric. This outdoor dining cushion measures 19.5 in W x 37 in L x 3 in H (Back: 19.5 in W x 20 in L x 3 in H and Seat: 19.5 in W x 17 in L x 3 in H).