Dual sided, pre-printed lines on one side and blank on the other offers endless uses for these dry erase boards. The blank side works great for classroom games, math lessons and reminders, while the pre-printed side is great for penmanship and sentence writing lessons. Each durable masonite lap board is 9" x 12" and can be used with all dry erase markers. They provide an environment friendly way to learn, as you just write, wipe off and re-use with no waste. Details:9" x 12"6 count