The billboard Series

Further Information

There are several standard sizes of billboards and printed bulletins used in the outdoor advertising display market. The names have remained from the old days when the posters consisted of a certain number of panels. Today’s posters are made with a considerably smaller number of panels, or may even be all one sheet in the case of a vinyl graphic. However, the basic sizes have remained the same since the panels used to display the older posters are still in use.

Source: Wikipedia