The Alvin Premo Ergonomic Chair Leather CH444-90 is a stylish yet practical office chair with attractive and easy to clean black leather upholstery. The seat and back cushions are contoured to better conform to your body. The molded foam seat cushion measures 19"L x 17"W x 3"H. The back rest measures 16"W x 14"H, and features heavy-duty spring-adjusted tilt control, as well as being height and depth adjustable. You can adjust the seat height of this office chair from 16½" to 21½" with the pneumatic control lever. The reinforced black nylon base is 25" in diameter with 5 swiveling wheels.