A Hair-slide a British term referring to a decorative hinged clip that girls and women put in their hair to hold it in place.
Hair slide is a kind of hair clip which is defined as any various hair small fasteners used to hold loose articles together.
See also:
"hair-slides" is in the CPC Code "38994"
Cigarette lighters and other lighters; smoking pipes and cigar or cigarette holders, and parts thereof; combs, hair-slides and the like; hairpins, curling pins, curling grips, hair-curlers and the like (except electro-thermic apparatus), and parts thereof; scent sprays and similar toilet sprays, and mounts and heads therefor; powder-puffs and pads for the application of cosmetics or toilet preparations