Set of 5: Provide all-day comfort with this cutout back stack chair. This chair is contoured with an ergonomic design for optimal comfort and back support. Ergonomic plastic seat and back with powder coated frame finish Plastic stacking chair: Steel frame can support up to 880 lbs. Chair stacks 20 high to save space when not in use, helping you utilize your entire space PRODUCT MEASUREMENTS: Overall Size: 18"W x 16"D x 29.75"H; Seat Size: 18.25"W x 16"D x 16.75"H; Back Size: 18"W x 12.75"H; No Assembly Required