90% Silver State Quarter Punch Out Stud Earrings. These earrings are handmade using the center punch out of the 90% silver State Quarter coin rings. These were just too cool to scrap so they have been re-imagined into stud earrings. Each earring features soldered sterling silver earwires and sterling silver backs. Because of the high silver content of these earrings they do not cause skin irritation. These studs measure 11mm and will always be the center 11mm of said coin. Each State has its own unique design! This makes what would be ordinary silver studs into something much more special. Carry a piece of your State with you everywhere you go!