When it's your big day let the whole world know with a Green It's My Birthday Circle Glow Shape! Measuring 3" in diameter and featuring a self-adhesive backing that allows you to attach it to nearly anything, the green It's My Birthday Glow Shape can be used almost anywhere! To activate your Green It's My Birthday Circle Glow Shape, simply locate the ampoule in the center of the badge and gently snap it, then shake it to disperse the glow product. Please note the glow feature in the Green It's My Birthday Circle Glow Shape is intended for one-time use only. Our Green It's My Birthday Glow Shapes are sold by the piece.