Abstract: The inventive display device has a continuous wall structure with first and second, substantially flat, facing wall pairs and a flat shelf portion cut directly out of each of the walls of the wall pairs. The shelf portions are foldable relative to their respective walls between a collapsed position, wherein they are substantially parallel to their associated wall, and a display position, wherein they extend transversely to their associated wall. At at least one corner of the structure, two adjacent walls are foldable against and away from each other about a fold line. The shelf portions on the adjacent walls are interconnected so that with the walls folded against each other the shelf portions reside in their collapsed position and upon the walls being moved away from each other, the shelf portions draw each other away from their respective walls into the display position wherein they cooperatively define a display shelf.