Engraved Hoop Earrings / Glow in the Dark / Sterling Silver 925 /Those earrings are the only one that glows in the dark, they are made in Sterling Silver 925 high quality and you can choose from 9 different glow in the dark colors! Those earrings are 1 inch diameter (25mm) VERY IMPORTANT : You must take great care of those earrings, otherwise the phosphorescent product may fall because it is a very thin lettering! It is better to remove the earrings before you go into shower or swimming. It is a very good product