Flash Furniture HERCULES Series Big & Tall 500 lb. Rated Black Mesh Executive Swivel Chair with Fabric Seat and Adjustable Lumbar Contemporary big & tall office chair 500 lb. Weight capacity High back design. Back Size: 22.5 Inch W x 26 Inch H. Arm Height From Seat: 8.5 Inch H Ventilated mesh back Adjustable built-in lumbar support.Nominal Seat Height Range:20 inches to 24 inches