How to Choose an Office Chair: 4 Steps to Ergonomic Seating That Actually Fits

If the seat height is wrong, every other adjustment compensates for a bad foundation. The correct seat height puts your feet flat on the floor, your thighs parallel to the ground, and your elbows at desk height with arms at 90 degrees. From that foundation, lumbar, armrests, and backrest adjustments refine the position.

For premium chairs like the Herman Miller Aeron, buying refurbished or used is often the correct decision. The Aeron has a 12-year warranty that transfers, the foam compression is minimal because Aeron uses an elastomeric mesh rather than foam for the seat and back, and refurbished units from reputable dealers are thoroughly cleaned and adjusted. For chairs with foam seats (most gaming chairs, budget office chairs), buying used is riskier because foam compression is the primary failure mode and it is difficult to assess without sitting in the chair.

Mesh seats breathe better and do not compress over time in the same way foam does. High-quality mesh (Herman Miller 8Z Pellicle, Steelcase Leap's foam-backed mesh) distributes pressure evenly and remains comfortable for 8-hour sessions. Low-quality mesh can develop pressure points at the edges of the frame. High-density foam seats (Humanscale Freedom, Knoll Generation) distribute pressure well initially but compress over 2 to 3 years of daily use, changing the seat height and feel. For long-session use, premium mesh is the most durable comfort option.

Check the manufacturer's measurements against your own: seat height range, seat width, seat depth, and backrest height. Most major ergonomic brands publish these specifications. If possible, visit a showroom to try the chair, Herman Miller, Steelcase, and Humanscale all have dealer networks in most major cities. Many dealers allow 30-day trials. If buying online without trying: buy from a retailer with a generous return policy, sit in the chair for at least 4 consecutive hours on the first day, and assess lumbar contact, thigh pressure, and armrest position before the return window closes.