Chalkboard Blank Pennant Banner. One Chalkboard Blank Pennant Banner is made of chalk paper pennants strung together with twine. Personalize your banner by writing on each paper pennant the right message for your event. Banner comes with 25 pennants to spell out what you want, and a piece of chalk to write with. Each pennant measure 6 inches X 5 1/2 inches, and the twine is 18 feet long!