The Ghostline® tri-fold foam presentation board features a 1/2" faint grid that makes it easy to line up words, charts or graphs. The grid pattern takes the guess work and measuring out of creating a display, making it easy to create the perfect presentation. It's a great solution for school, home, art and office applications. The Ghostline® tri-fold foam presentation board is 28 in. wide by 22 in. high, and folds to 12 in. wide by 22 in. high, so it's easy to carry and take with you wherever you need to go.