Barrette (Hair Accessories)

Underneath the decorative plate sits a hinged metal bar that snaps into a catch at the far end, trapping a thin section of hair between the two. Because the bar is straight and the section is small, this holds a slice of hair rather than a bundle. The visible plate does at least half the job by being seen. The mechanism is a simple over-center spring, meaning it clicks shut and stays shut until you press the ends.

Bar length sets what it can hold, running from about one inch for a single strand at the temple up to four inches for pulling the front half of the hair back. French clasp versions, where the bar folds against a curved plate, hold more securely and cost more than the plain straight-bar type. Weight is the failure point on ornate designs, since a heavy metal or beaded plate on a small section pivots and slides down. That means the more decorative it gets, the more hair it needs underneath it.

A claw clip holds a whole twisted updo with sprung jaws, which no barrette can manage. Bobby pins do similar small jobs invisibly, where a barrette is meant to be looked at. Combs anchor into the scalp with teeth and hold a built shape, while a barrette only clamps flat. Compared with a headband, this fastens rather than spans, so it can sit anywhere on the head.

Pulling back the front sections, holding a half-up style and finishing a braid all suit a barrette, and it is the friendliest option for shorter hair that a claw cannot grip. Very thick hair is the wrong match, since a straight bar cannot close over a large section. Skip heavy ornamental versions on fine hair, because they slide under their own weight.

Test the click. A good clasp shuts with a firm snap and takes real pressure to reopen, while a weak one springs loose in a bag. Plate edges should be rolled or smooth rather than stamped, as a raw metal edge cuts strands every time you fasten it. Store them clipped shut, which protects the spring from being forced open in a drawer.