Hat pin, or stick pin, 7 in long, with clutch (stopper w rubber insert). Add your own top - secure with glue. Crimps work too. Nickel plated clutch. Pin is Nickel Silver.
Update! I tried using these to lampwork onto - applying molten glass and annealing them in the kiln. They worked great - the metal darkened a little, but a quick rub with some 1600 grit sandpaper and they came up looking fine.
178mm By the each.