The Metaphor 4-leg combination chair and desk (combo) is one of the most economical classroom solutions available. It comes with a 18" x 24" rectangle hard plastic top, polypropylene seat buckets, standard Graphite glides, tubular steel Chrome frame and bookrack. Greenguard certified for indoor air quality, meets ANSI/BIFMA standards. Ten year warranty. Overall dimensions: Width: 23 3/4" w x 36 3/4" d x 31" h, seat height is 17 7/8" .