Office + Style's Magnetic Dry Erase Board with Corkboard Side Panels is 18x24 inches. The whiteboard is magnetic and is dry erase. The 2 side columns are made of cork board allowing the sides to be used as a bulletin board. There are also 2 magnets included in this package which can be used on the whiteboard to hold papers to it. The whiteboard measures 18x24x0.25 inches and is made of both plastic and metal.