Small removable closure, usually made in sets, for shirts
A shirt stud is a decorative fastener that fits onto a buttonhole on the front of a pleatedshirt, or onto the starched bib of a stiff-front shirt. Such shirts have special buttonholes solely for shirt studs.
In the western world, shirt studs were first used in the mid-19th century, when some shirt fronts were too stiff to close with buttons. So remains the case for the heavily starched, modern full dress shirts worn with white tie.[1]