A type of barrette. A barrette (American English), also known as a hair clip, hair-slide or clasp (British English), is a clasp for holding hair in place. They are often made from metal and/or plastic and sometimes feature decorative fabric. In one type of barrette, a clasp is used to secure the barrette in place; the clasp opens when the two metal pieces at either side are pressed together. (source)