1970s Vintage Round Plastic Ponytail Hair Comb
Classic plastic hair slide, circular in shape that opens on a hinge with teeth combs on each half to hold a ponytail securely, this one may be older that 70s but it’s hard to tell.
Vintage sizing is very different to modern day sizes, they usually are at least 2 sizes smaller depending on the era of manufacture. So to ensure a good fit please go by the measurements provided. I measure the garment laid flat edge to absolute edge then double, which give the maximum, you will need to measure your own clothes to compare sizing