Oversized dimensions for ultimate big man support and comfort Flip-up bolster provides excellent leaning surface while docking Roto molded, high-impact Marine Grade seat frame, with comfortable compression foam padding; Includes Wise 8WD399-1 mounting plate Heavy-duty 28 oz Marine Grade vinyl - withstands the effects of sun, heat, rain and soiling under normal marine environment conditions SEAT DIMENSIONS: Height: 26", Width: 24", Depth: 26", Sitting Depth: 18", Sitting Width: 15.5"