Correx boards are produced from corrugated polypropylene, often called a fluted plastic board. This materials would make for trusted signage resulting from its rigidity, and colorfast, water-resistant and weatherproof Qualities. The most print measurement for just one sheet of Correx® fluted polypropylene board is 8’ x 4’ (2440mm x 1220mm). https://www.indigosupplies.com/blogs/news/protect-floors-and-surfaces-with-correx%C2%AE-temporary-floor-protection