Super Hero Heart Charm On A Adjustable Cable Chain Necklace, 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 Snake Chain Necklace With 3 Inch Extender Attached Equals As Long As 21 Inches.