Dependably hold signs, charts or crafts with the Pro-Art Posterboard. Durable, with 4-ply thickness, the board lends a sturdy base to exhibit papers, paints and more. It also makes a great classroom addition or a notice board accessory. They are great for block printing, painting and art projects. Great for students and professionals alike, these posterboards are a smart pick. The package consists of 100 poster boards.