This student desk features a trapezoid shaped top that allows 8 desks to be grouped into a 7 foot octagon for collaborative learning activities. Product Details: Overall Dimensions: 21 1/8" D x 30 3/4" W x 22" - 34" H. Diameter of 8-desk octagon: 85". Adjustable height legs: 22" to 34" in one-inch increments. Desktop: 5/8" thick FRW hard plastic work surface - 21 1/8" x 30 3/4" trapezoid shaped. Glides: Steel base swivel glide with 1 3/8" diameter polypropylene sleeve in Graphite only. Silver Mist or Char Black frame finish. Frame & legs: 19 gauge tubular steel