Get The Bad Guys in your Police Halloween Costume! What ya gonna do when they come for yous The Cotton Police Hat is the perfect accessory for costumes and events alike. One hat per package. Adjustable: One size fits most adults. Approximately 19″ to 23″ circumference around inside of hat. Cotton Police Hat. Made in the USA. Our unique Halloween costume accessories are just what you are looking for. A simple costume accessory for your perfect Halloween costume that your guests will remember and enjoy! Plus, the black chauffeur hat is a great costume accessory for your Kato Green Hornet costume.