Seating

Ergonomic chairs and seating accessories, compared on seat depth, seat height and the body they are built around.

Buying guides

Seven ergonomic chairs Amazon stocks from the brands' own storefronts, from Branch and Steelcase Series 1 to Leap and Gesture, compared on fit.

Six chairs under $500 on Amazon, from Steelcase Series 1 and Branch to HON and SIHOO, compared on seat depth, weight rating and warranty.

Six chairs for tall people, compared on maximum seat height, maximum seat depth, backrest height and published user height ranges.

Six chairs rated 395 to 450 lb, compared on published weight limits, seat width and the room between the arms, from HON, Steelcase and Secretlab.

Steelcase Leap or Herman Miller Aeron: one adjustable size against three fixed sizes, upholstery against mesh, and where each is actually sold.

Two measurements decide whether a chair fits: popliteal height and thigh length. How to take them, and which seat ranges match.

Three short guides to take the numbers that decide fit.