Sign is made up of like a gloss poster board. It is not cardboard. Has more of a plastic feel to it. This was used at Gate 6 outside the stadium during the 2008 All-Star Game. It has some holes from being mounted and some other imperfections. It is a bit bowed due to its age, but it can be flattened to be mounted or framed in your home. It was purchased from Steiner for almost $1800 after they started selling off things from the old stadium. The letter that came with it was lost in a move over the last few years. I attempted to call Steiner, but since it was recently acquired by Fanatics, they no longer have access to sales that occurred before the acquisition. This is extremely rare and just have no space in my home, unfortunately. Sign measures 36” X 24”. Very cool and not another one like it around.