Glossary A–ZLetter 1
18-sheet billboard (Großfläche)
The Großfläche is a classic poster format in German out-of-home advertising, a landscape format made of 18 sheets of A1 paper, hence the designation 18/1.
The poster therefore measures about 3.56 × 2.52 metres. It is mounted on walls or on free-standing panels.
These billboards are typically located on busy roads and are aimed at drivers and pedestrians from some distance. They are booked for fixed periods, either individually or as a network across a city. Digital screens in this format also exist. A creative for this format relies on one large image and few words, because people driving past have only seconds.
Anyone transferring creatives from a printed poster to a digital site should check the aspect ratio, as a screen often has a different one from the poster. Digital billboards on roads are subject to local rules on brightness, image changes and motion that stem from building and road traffic law. The format says nothing about the number of viewers; that requires audience measurement.