Our Premium Project Boards are made of durable, Eco friendly, 100% recyclable polypropylene. Rounded corners are safe for use with children. These project boards are superior to less rigid competitor products. When looking for a project board that can be used longer than corrugated or foam project boards, look no further. Measures 36" x 48" . Use non-permanent materials for the ability to re-use. Use non-permanent materials for the ability to re-use. Each pack includes 10 boards.