Fun for theme parties, birthday party favors, Halloween, festival fashion & more! To activate your Shiny Cowboy Hat, remove the pull tab and press the button on its battery house up inside the bucket. Choose from Flash, Blink and Steady lighting. Dimensions (LxWxH): 15 in. x 9.5 in. x 5 in. One size fits most - Up to 22". Light Up Cowgirl Hat comes ready to use with 2 replaceable CR2032 cell batteries.