Two-sided, XY Axis Dry Erase Learning Mats are great for teaching and practicing mathematics fundamentals. The bright white sheets have bold blue lines separating the mat into quadrants, each 14 squares by 10 squares. Total grid is 28 squares by 20 squares. Individual squares measure 3/8" x 3/8" . The back side is plain white dry erase with a blue border. The mats feature a high-quality, non-ghosting write-and-wipe surface with smooth, rounded edges and corners. Each sheet measures 9" x 12" . Each pack includes 24 individual mats.