Halloween Earrings Black Bat on Yellow Full Moon Bat Sign Yellow New Vintage Fun Novelty Costume Jewelry Superhero Halloween Holiday Party Yellow Moon Black Bat Sign. These are a new pair of stud earrings, with a simple push on metal back. They are made of yellow plastic and have a black bat painted on them. I repainted the bat to add a little bit of glitter to them in the paint, very faintly. They are the Bat sign on the yellow full moon with the bat figure. They are a little bit bigger than the size of a quarter and are round and puffed out. If you have any questions just message me and I'll be happy to help you. One of the backs is goldtone and one is silvertone, but not really much difference that you can tell it.