To activate your LED Flashing Cowboy Hat with Pink Sequins , flip the switch on the battery house that resides up inside the hat. Lights FAST FLASH only. LED Colors: Pink Dimensions (LxWxH): 15 in. x 9.5 in. x 5 in. One size fits most – Up to 22″ Comes ready to use with 4 replaceable AG10 Batteries.