Abstract: The display device includes an ordinary mailing envelope with a slot in the back. A stiff fiber-board card is inserted into the envelope. The card has a tab or tongue which is pushed outwardly through the slot in the back of the envelope to serve as a prop to support the envelope in the manner of a display card for counters or shelves in stores, etc. On the front of the envelope is printed the message to be displayed. Alternatively, the front of the envelope is fully or partially transparent, and photographs or other graphic matter are inserted into the envelope with the picture showing so that the display device serves as a relatively simple and low-cost picture frame.