Purchased from a vintage shop one year ago. Size: Approximately 1.8 cm in diameter. Sparkly and very cute! ☆ Material is unknown. I have only tried it on, and it's in good condition, but please understand that it is vintage before purchasing. Please refrain from purchasing if you are sensitive to such items. m(._.)m I am also selling on another app, so please comment before purchasing. I have many other accessories for sale, so please take a look if you'd like (^_^) Color: Blue