Sunbrella Outdoor/Indoor Round Seat Pad Knife Edge in Tangerie by Comfort Classics Inc. Renew your outdoor patio furniture with a new Sunbrella Round Seat Pad . The dimensions for this pad cushion are 18" Round x 2"H and it has a Knife Edge construction. No ties Sunbrella Fabric is one of the durable fabrics for outdoor use. All Of our cushions are made with Quick Dry Comfort Technology which makes your cushions Dry Rapidly Sunbrella Seat Pad Comfort Classics Inc. has over 50 years of experience in the outdoor cushion industry. We take pride in our cushions and customer satisfaction is our No.1 priority.