No getting pinched on St Pats Day with this derby hat. The green bowler derby hat is the perfect solution for finding green to wear on St Patrick's day. Get your green on this St Patrick's Day. With a wide selection of hats, beads, costumes, novelties, favors and decorations you'll be sure to find everything you need for the Green day. Stock up for classroom parties, parades, or pub crawls. We have everything you need for your Irish celebration.