Here is a fun FREE printable Spongebob birthday banner to add to your Spongebob party theme. This free printable includes yellow spongy looking letters to spell “HAPPY BIRTHDAY”, one letter per sheet and additional spacer sheets with Spongebob and Patrick. The whole banner has 16 sheets and prints on 8.5 x 11 from a multi-page PDF. This Free Spongebob banner also includes instructions on how to assemble for your party. When your banner is assembled on string it is over 10 feet wide. This banner makes a great undersea decoration. You can download your free Spongebob birthday banner below.