All posters are printed on heavy, acid-free 10 pt. chrome-coat paper, 24″x36″, four/five color litho. All are limited edition of 500 (not numbered), suitable for framing and were all created exclusively for WorldFest-Houston. We hate to call them posters. More like fine art prints. They are shipped rolled in a heavy tube via the postal service of your choice. These are all custom-print posters, made just for you, one at a time! This is the special NASA Bootprint on the Moon Poster for our 49th.