Todd 1000 Helmsman Chair is 21 1/2" high, 22" across, with 18 1/2" front to back. Molded from white virgin UV stabilized polytheylene. 2 7/8" diameter, 15" fixed height aluminum pedestal post with 9" base. Comfortable molded armrests and self draining seat. Includes slider and extra large cushions, upholstered with white mildew resistant marine vinyl.