Provide all-day comfort with this ribbed back stack chair. This chair is contoured with an ergonomic design for optimal comfort and back support. Polypropylene seat and back with powder coated frame finish Plastic stacking chair: Steel frame can support up to 551 lbs. Chair stacks 5 high to save space when not in use, helping you utilize your entire space PRODUCT MEASUREMENTS: Overall Size: 17.75"W x 20"D x 31.5"H; Seat Size: 17.75"W x 16"D x 17.5"H; Back Size: 16"W x 15"H; No Assembly Required