The Alvin Monarch Office Chair CH555-85 has black fabric upholstery with bright blue accents, sure to liven up your home, office, or classroom. The seat and back of this adjustable chair are fully padded, with thick contoured cushions that support your body. The molded foam seat cushion is 19"L x 18"W x 3"H, while the back rest is 16"W x 19"H. Both back and seat have tilt-angle control. The back is also height and depth adjustable. Seat height is adjustable from 18" to 23" with the pneumatic control lever. The 5-star base of this task chair is made of reinforced black nylon and is 23" in diameter with 5 swiveling wheels.