The Glow In The Dark Moon Enamel Pin glows after being exposed to bright light. Made from black plated metal and glowing enamel. - Measures approx. .95" (24mm) in diameter. - Wear this celestial pin on your lapel, jacket. This spooky enamel pin of the moon glows in the dark. During the day, the enamel is pale yellow. After being exposed to light, it will glow green. Wear it out at night for astrological flair!