Twinkle Set of 6 Fiber Optic LED Butterflies - Changes Colors and Flashes - Peel and Stick Adhesive Back Great decoration to add sparkle for any event, birthdays, anniversaries, etc. Perfect for outdoor parties, in flowers, center pieces, and on gifts LED cycles through multiple colors and flashes to give the butterflies a realistic look Peel and Stick backing for easy application- dimensions; 2" x 2.75" Uses 3 AG13 button cell batteries each - included