Tangkula Mid-Back Adjustable Ergonomic Mesh Swivel Durable Office Chair Tested For:120-150 Kg(264-330lbs) Dynamic State Overall Height: 33.1-37.6 Overall Dimension: 16.2" X 21.3" X 39" (Highest) Seating Area Dimension: 15.8" X 16.5" (W X D) Back Rest Height From Seat: 17.7"