Celebrate your birthday in style and be sure everyone knows it's your big day with our Blue It's My Birthday Circle Glow Shapes! These It's My Birthday Glow Shapes can be used as name tags, party decor, favors, or other festive ways to brighten up your big days! Each Blue It's My Birthday Glow Shape measure 3"in diameter and features a self-adhesive backing that allows you to attach it t almost anything. To activate your it's my birthday glow shapes simply locate the ampoules in the center of the badge and gently press on it until it snaps, then shake to disperse the glow product. Please note the glow feature in the Blue It's My Birthday Circle Glow Shapes is intended for one-time use only.