Award-Winning Authentic 2002 Ergonomic Herman Miller Aeron Desk/Office/gaming Chair. Seat width: 20″/seat Height: up to 20.5″. All features work great! Wheels work on both hard and carpeted surfaces. Fully adjustable up/down, tilt forward controls, tilt back restrictor, 100 degree rotation, adjustable arms, up/down-in/out, Excellent lumbar support.