Size: 3/8" in diameter, back with spring shanks. This set of 3 vintage tuxedo studs features a retro design with a gold tone color and round shape, perfect for special occasions like engagements, graduations, weddings, and Valentine's Day. Made of metal and sourced from the United States, these studs exude a classic and sophisticated charm that is sure to elevate any formal outfit. The black front adds a touch of elegance and versatility, making it a timeless accessory for men.