These are .75" thick sheets of low density acrylic with a translucent polka dot pattern. These were previously a part of a massive model train setup and used as supports and other applications. None of these pieces are square or even in any way and have cut outs, notches, and steel brackets. The acrylic is lightweight and slightly flexible. You could make smaller pieces that are more even and square out of these larger pieces. This is a bulk item. No holds please.