The word "stud" has two basic meanings, and both are associated with fashion. Firstly, the hairpin called hair accessory - a long, thin rod, usually metal, which helps to keep the hair in the hairstyle. Studs can be decorated with beads, sequins and other decorative elements, and can be simply folded in half metal rod. Modern studs usually have two rounded ends - not to injure the scalp. Studs, both ends of which are tightly pressed against each other, called invisible - and indeed, in such hair barrettes are almost invisible. Studs ladies used in Ancient Egypt - then hair ornaments were considered a sign of luxury.
Secondly, under the pin can understand very thin high heel. It is believed that the stud invented by the French fashion designer Salvatore Fergamo in 1950, but there are many other versions. Since the pin is very thin, but suffers from heavy loads, it is made of very durable plastics. Sometimes stud height can reach up to 16 cm, in rare cases - more, but then the shoes are still high platform.