Unlike regular cardboard, it has been treated with a sexo processing of three layers of reinforced cardboard, so it is very light and strong. The size is the same as the size of concrete blocks you see in the market, and it is also great for interior decoration. Size (W x D x H): 15.4 x 7.9 x 3.9 inches (39 x 2The last thing you need is to do is treat as a recycled garbage so it is environmentally friendly.