Big and Tall Stack Chairs are extraordinarily comfortable with extra-wide seat backs and seat pans. Made of blow-molded, high-density polyethylene, they are ergonomically contoured for superior support and comfort. Durable material is dent-resistant, scratch-resistant and washable. These Rough N' Ready Stack Chairs will look "good as new" even after many years of use so it's perfect for breakrooms, offices and schools. These chairs are extremely strong and lightweight. Nonmar feet protect your floor surfaces. Frame is made of heavy-gauge, 7/8" powder-coated steel tube with reinforced crossbars and holds up to 350 lb. They stack up to six high. Seat measures 24" wide x 20" deep x 18-1/2" high. Back is 24" wide x 12" high.