6 months & up. Chunky Stackable Chairs enhance both student comfort and classroom efficiency. Made with rugged polypropylene shells and sturdy matching powder-coated steel legs. Arched legs provide comfortable armrests for chairs up to 13.5" seating height. Chairs are steel-braced on the underside for extra stability, and nylon-tipped feet help protect classroom floors. Lifetime warranty. Choose height and color.