This Inbox Zero mesh back drafting stool is perfect for offices, warehouses, training areas, and more. 16-1/2" H x 17-3/4" W Plastic trim backrest ensures long-lasting durability. Drafting stool built-in lumbar support provides added back comfort. The back is height adjustable by 1-1/2 inches. Height adjustable T-arms align arms and wrists correctly for data entry work. Arms also adjust from side to side.