Have a Happy St. Patrick s Day with Decorations! The St. Patrick s Day Pennant Banner is the perfect decoration for your St. Pats party. A fun and easy way to add some Irish style to your event. 12 long and 10 wide. Green and gold pennants with Happy St. Patrick s Day print. Made of plastic. Show your Irish pride with St. Patrick s Day decorations. Cover every room in green with our St. Patrick s Day cutouts banners and table decorations.