Ergohuman Eurotech Mesh Chair - 18.1A 22.9" Seat Height - High-Back Chair With Headrest - Blue - Blue Seat Height: 18.1a"22.9" Seat WxD: 19-1/2x17-3/4" Adjustable: tilt tension control, tilt lock, back angle, back height, synchro tilt, seat height, seat depth, and arm height Material: Mesh Base Type: Nylon Casters