There are pins, ashtrays, bookshelves etc. made of the Rammstein's logo, why not a 3D printable hair pin?
Modeled in Fusion 360, printed "flat" in PLA with 100% infill it weighs just 16 g.
The dimensions are ~86×90×24 mm.
You will need a needle to keep it in place.
The author marked this model as their own original creation.