Wise Pinnacle Series Jump Seat Vinyl Wrapped Injection Molded Plastic Frame, Marine Grade UV and Mildew Treated Vinyl High Compression Foam Padding, Underneath Storage Height: 27.5 in., Width: 16 in., Base Height: 10 in. Depth: 18 in., Seat Depth: 13.25 in. Jump Seat is not freestanding; Back Rest requires support