Abstract: A first embodiment of combined letter and envelope includes a single piece of paper divided into halves by a crease. A front half has two regions divided by a first perforation extending through both the front half and the back half of the paper. The rear half is also divided into upper and lower regions at the same perforation. The rear half has a second perforation extending only through the rear half and slightly below the first perforation so that a narrow horizontal strip of paper may be removed to reveal a narrow flap on the front half having a rear surface covered by an adhesive. The envelope is created by removing the lower regions of the front and rear halves from the upper regions at the first perforation, removing the strip of paper defined by the second perforation, wetting the adhesive that is exposed by removal of the narrow horizontal strip of paper, and folding the flap with the glue over a rear surface of the lower region of the rear half of the piece of paper to seal the envelope.