1/4" Graph Dry Erase Board, 11" x 16", Pack of 12Graphing practice on dry erase saves paper! Bold lines separate board into quadrants each 20 squares by 20 squares; total grid is 40 squares by 40 squares. Individual squares measure 1 4" x 1 4". Plain work space is 11" x 5 1 4". Boards feature non ghosting dry erase surface with rounded corners and smooth edges for safety and comfort. Durable hardboard backing is warp and chip resistant. Each board measures 11" x 16" x 0. 125". Includes 12 boards.