To activate your LED center piece, slide the button on the bottom of the base. Fibers & base will glow a steady bright pink. Dimensions: Fiber Strand Height: 4.0 in. Fiber Strand Width: 5.75 in. Base Height: 1.50 in. Base Width: 1.75 in. LED Color: Pink Base Color: Pink Light Up Small Pink Centerpieces include 3 replaceable AG13 Batteries.