Twenty inches tall! This seat is for the big guys and those who want the maximum support one can find in a sit-on-top style seat. 26 inches wide, 1 inch thick seat pad, bottom pad 17 wide by 15 inches front to back. Seat pad is flexible and will conform to the shape of most sit-on-top cockpits. Constructed of durable Sombrella with fiberglass back battens. Color is black. Made in the USA.