What seat depth should an office chair have?

The correct seat depth leaves 2"–4" of space between the front seat edge and the back of the knee when sitting fully back. Most standard office chairs have a seat depth of 16"–19". Taller users need 19"–21"; shorter users need 15"–17". Many ergonomic chairs include an adjustable seat slider. FindOfficeFurniture.com lists seat depth dimensions on every chair spec — call 888-719-4960.