The big and tall series of the Space chairs have generous sized seats and backs both in width and depth. The 63-37A773HM has adjustable lumbar support, one touch pneumatic seat height adjustment.  Also features mid pivot knee tilt and adjustable tilt tension control, height & width adjustable arms with PU pads and an adjustable headrest.   Assembly required   Please note: orders of 4 or more chairs will ship with a freight carrier, and are not traceable via UPS. Please allow 10 days before contacting O.co regarding any freight carrier shipping concerns.