Iron Flat Head Pins, Cadmium Free & Lead Free, Platinum ColorSize: about 0.75~0.8mm thick(20 Gauge), 4.5cm long, Head: 2mm.A jewelry-maker's staple, Flat Head Pins allow you to make earrings, pendants, links and drop embellishments faster than lightning. Caused by the property of material, pins may be bent but that won't impair their use.