The Alvin Art Director Executive Chair CH777-90 has extra-thick seat and back cushions covered in luxurious genuine black buffalo leather. This office chair is durable and easy to clean, as well attractive and comfortable. The high back rest measures 19"W x 20"H; the molded seat cushion measures 20"L x 19"W x 3"H. Seat height is adjustable from 17" to 21" with the pneumatic control lever. This adjustable chair also has fixed armrests. The black nylon base is 26" in diameter with 5 swiveling wheels. Some assembly is required.