These tough 13-1/2" chair desks have a high-density, polyethylene shell with a 14-gauge frame and 16-gauge rear legs. Our chair desks also feature a large work surface, measuring 18" x 24". These durable chair desks have a hard plastic work surface and come in a variety of chair colors. Extra large desks now offer an extra 2-1/4" space between chair and desk top, for larger students. Each unit ships two per carton.Must order cartons in one size/color. Broken Carton Charge is $10.