•A height- and tilt-adjustment feature. It should be easy to adjust your chair height from 40 cm to 52 cm (15.5 inches to 20.5 inches) as measured from the top of the seat pan to the floor. If you are much taller or shorter than average, you may need a chair that can be adjusted beyond this range. Adjust your chair so that the work surface or keyboard tray is at elbow height and your feet are flat on the floor with your knees slightly bent below your hips. Ideally, the seat pan should be able to tilt both forward (minimum of 5 degrees) and backward (minimum of 10 degrees). If the chair has an adjustable seat pan, inclining the seat slightly forward will transfer some of the pressure from the spine to the thighs and feet. This will relieve pressure on your back.
•A curved seat edge. The front of the seat should be curved and finished in a “waterfall” edge.
•An adjustable back support in both height and forward and backward tilt. It is important that the backrest correctly supports the lower part, or lumbar curve, of the back.
•A freely rotating swivel so you can move easily from side-to-side.•Fully adjustable and padded armrests. The chair arms should not interfere with adjusting the chair or moving it close to your work surface.
