These Inbox Zero stools are engineered to make personal positioning easy, so you're more comfortable and productive. Back and seat angle adjust simultaneously to cradle your back for day-long comfort. Pneumatic 24-3/4 to 28-1/4" seat height adjustment to ensure that your feet and legs are properly supported with the 7-1/2 to 11" H adjustable chrome footrest. The generously sized seat has extra thick 3-1/2" padding covered in durable 100% acrylic upholstery. Waterfall contoured design helps to reduce stress on knees and ensures proper circulation. A contoured back provides lumbar support and encourages proper posture. Independently adjustable back angle, tilt lock and back tilt tension adjustment. Manager stool seat 20" W x 19-1/2" D, back 19-1/2" W x 20" H.