Metal Whistles - Pack of 12 - Noise Making Fun Party Favor Around The Neck Blue Nylon Cord - Themed Birthdays | Christmas Gifts | Look Professional, Be Professional! 12 pieces Metal Whistles. Perfect add-ons in your costume and party. Whistles measures 2 inches each, made of metal that can last long and also equipped with 36 inches assorted color nylon cord. Great party favors in your police themed party, sports referee and much more. Great party favors in your police themed party, sports referee and much more. Metal whistles can also be great in pinata, christmas shoeboxes and goody bags and also perfect for camping, can be used as warning or call everyone to gather. Safe to use, it can generate enough sounds and can be used in a game, good for pretend play.