• Whether you're heading out for a pub crawl on St. Patrick's Day, hitting the streets of New Orleans for Mardi Gras, or any time green fits your color scheme, our plasticGreenDerby Hats are bound to get your guests in a celebratory mood. Pass these hats out as party favors or incorporate them into your decorations after jazzing them up with some craft supplies and a little creativity. Our Green Plastic Derby Hats are packed and sold in a polybag of 12 hats.