Super Hero Heart Charm On A Adjustable Cable ChainNecklace, Hypoallergenic Safe- No Nickel. Lead, Or Poisonous Cadmium. Will Not Irritate Anyone With Sensitive Skin | Copyright ©2018 Cardinali®Jewelry| Custom Made In The U.S.A. Beautiful Silvertone 18 Inch Cable Chain Necklace With 3 Inch Extender Attached Equals As Long As 21 Inches