Arksen Ergonomic PU Leather Office Executive Chair Computer Hydraulic (Black) Ergonomic office chair with lumbar support and pneumatic seat height adjustment Seat Dimensions: 18.5"(W) x 17.5"(D) Back Dimensions: 18.5"(W) x 24"(H), much wider and taller Adjustable Height For Seat: 38.5"-42.5" ; adjustable height Weight Limit: 660LB; easy assembly upon arrival