Iron Cable Chains, Unwelded, Oval, Lead Free and Nickel Free, Gunmetal ColorSize: Chain: about 3mm long, 2mm wide, 0.5mm thick.Iron Chain is a wonderful component for making jewelry. They can be matched with jump rings and clasps, as well as acrylic beads, glass beads, gemstone beads to be popular necklaces, bracelets and belts. They also can be used as separate extenders and dangles.