The frames SHOULD hold big signs, about 24W? x 26T?, but the stretch cords that hold the frames together & reinforce it diagonally, ARE MUCH TOO SHORT. 9? IS THE WIDEST YOUR SIGNS CAN BE, if they?re made of inexpensive corrugated plastic board or foam board. The boards will buckle if you use anything wider than 9?! The cords are so short that they probably wouldn?t even work if you used thin plywood. Also, these cords would be hard to attach if you have arthritis. I am removing these cords, and will try making longer cords that are each partially stretchy. I will try to post with an update?but at least, you?re now warned.