Good News!!! You will get ONE PACK MORE as a GIFT if you BUY 2 PACKS in one order!!! Feature: The products adsorb light and glow in the dark. Size: Please compare with the Coin in the picture.Material: PlasticColor: MulticolorPackage Content: 9PCS/PACK + Double-sided foam tape How to use:Use the enclosed double-sided foam tape to stick one side on the product and the other side to a clean and smooth surface.Turn on your lamplight for the sticker to get "charged" at night.After 10 minutes， turn your lights off and you will see the stickers shining brightly!