How big is the seat on a typical drafting stool?

Round drafting stool seats typically measure 15"–18" in diameter; contoured or rectangular seats run roughly 17"–19" wide by 16"–18" deep. Big and tall models offer wider seats at 20" or more. Seat width and depth matter more than diameter for ergonomic fit — aim for enough width to accommodate the user's hips with 1"–2" of clearance on each side. FindOfficeFurniture.com lists full seat dimensions on all product specs — call 888-719-4960 for sizing help.