One 8.5 inch tall x 5.5 inch wide Blue Happy Birthday Flashing Cake Decoration. Block letters are covered in blue glitter and feature five flashing LED lights. Includes on/off switch on back. Take a plain cake from boring to brilliant with our Blue Happy Birthday Flashing Cake Decoration. Easy to use: Simply slide the pick down into your baked goods, turn on the flashers, and get ready to party! The flashing lights combined with any candles that you use are going to give your party table that "something special" that sets your party apart from the rest.