Black domed studs in a bright shiny-finished lucite. This is the 'Retro Button Stud' style & is a low-domed button with a flat back. This pair measures just under 3/4" or 18mm in diameter.
Earrings are made with lucite parts & hand-set them with surgical steel earring posts and they have sturdy surgical steel/acrylic backings on them as well. Light-weight & fun to wear.