This stack chair features an ergonomically contoured design with a curved back for exceptional support and is perfect for training or conference rooms. Polypropylene seat and back with powder coated frame finish Plastic stacking chair: Steel frame can support up to 770 lbs. Chair stacks 5 high to save space when not in use, helping you utilize your entire space PRODUCT MEASUREMENTS: Overall Size: 22.5"W x 17.75"D x 31.5"H; Seat Size: 15-18"W x 16"D x 17.5"H; Back Size: 16"W x 14.5"H; No Assembly Required