Balt Ergo EX Executive Mesh Office Chair, Ergonomically Adjustable, 28-Inch by 24-Inch by 51-Inch, Black (34434) The Ergo ex is Designed to provide unmatched comfort and unmatched customizability Padded and contoured seat measures a generous 21"w x 18 Seat features adjustable depth, and is height adjustable from 17" to 20"