Trijaya Living Seat Cushion: 17"Wx17"Dx2.5"H Knife Edge Davidson Redwood Go to amazon.com Related posts How to find the best dx knife for 2022? FeatureDimensions: 17" x 17" x 2.5"Foam size: 18" x 18" x 3.5"Care: spot clean DescriptionSeat cushion knife edge. Dimensions: 17" x 17" x 2.5". foam size: 18" x 18" x 3.5". care: spot clean. model/stock# : SECU170