18" x 24" solid plastic desktop Polyethylene shell seat in eight colors Two solid plastic top colors Nylon base glides Sold in carton quantities only (2 per carton) Made in the USA. 10 year manufacturers warranty. 15 1/2" distance from the desktop surface to the back of the seat. XL desk is 17 3/4" distance from the desktop surface to the back of the seat. (Model SCH627-ELSPBR) Available in XL size! 18 1/2" seat height (Model 628-SPBR)