Shop 16" Lighted Shimmering Happy St. Patrick's Day Shamrock Window Silhouette at Michaels.com, display some of your Irish heritage with our Saint Patrick's Day silhouette decoration. Designed with a rustic black wood look featuring a shamrock and the words "Happy St. Patrick's Day!". The unique finish has a shimmer to it giving the silhouette a little extra sparkle. It includes a suction cup and is ready for hanging.