THE SCIENCE BEHIND A RAINBOW! Rainbow Bulletin Board Letters, Rainbow, Sky, Spring, Fall Classroom Décor, Rainbow, Sky, Spring, Fall Sayings Rainbow, Sky, Spring, Fall, Summer, Back To School, End of Year The words read, THE SCIENCE BEHIND A RAINBOW! Size: 8.5 by 11 inch (letter paper) To print 2 or more letters on one page, please choose print multiple pages, option in your printer. Great for a quick bulletin board, door display and more.