12ft Happy 10th Birthday Prism Banner. Add more color to your party with our disposable “Happy 10th Birthday” Prismatic Banner. 1 Birthday Banner – 12 ft. This cute prismatic banner features a “Happy 10th Birthday” headline with fun and colorful design. This disposable prismatic banner is perfect for celebrating fun birthday parties. Made of durable foil material, this prismatic banner is very eye catching with high quality prints. This product is easy to assemble, install, and can be stored and re-used.