Brass Earring Hooks, with Beads, Nickel Free, GunmetalSize: about 19mm long, hole: 1.5mm, pin: 0.7mm.Brass earring with exquisite shape. Its antique style and strong metal sense are another attraction to you. Fishhook earwire, headpin and jump ring sets are an economical approach to jewelry-making classes and for keeping costs down on your finished jewelry lines.