Adjustable backrest height and seat height with the tilt tension control knob and single lever seat lock. Adjust chair into any position. The seat slider allows seat depth adjustment ranging to 2.5 inches with locking positions for every half inch. The back rest is 20" wide and 23" high for physical support. Saddle shaped seat for maximum comfort. Seat dimension of 21"wide and 19" deep with a 3 inch thickness. This chair comes in several different colors so you can match your warehouse with this chair.