Hair pins are long, narrow hair accessories used to pierce through a bunch of hair, pinning it in place. Hair pins are typically a narrow U or V shape, and come in a variety of sizes, styles, and materials, including simple hair sticks, bobby pins, pins with more than two prongs, pins with a cuff to slide into, chignon pins and more! Some hair pins are decorative and meant to be seen, while others are meant to be tucked away, hidden in the hair. One of the most popular ways to use a hair pin is in a bun. A bun can be sophisticated and sleek or a messy bun - the right hair pin will do the trick! Another popular type of hair pins are bobby pins.