6 years - adult. Made with a rugged polypropylene shell and sturdy matching powder-coated steel legs. Chairs are steel-braced on the underside for extra stability, and nylon-tipped feet help protect classroom floors. Measures 21.5"L x 19.5"W x 30"H and has a 250 lb. weight limit. Factory second item, contains minor imperfections -- you probably will not notice! Same high quality at a great low price. Due to these discounted prices we cannot offer our standard warranty. All Sales Final - No Returns. Limited Quantity!