Tiffany & Co. Heart Tag Toggle Necklace Treat yourself to this gorgeous, 100% authentic Tiffany & Co. Heart Tag Toggle Necklace in 925 sterling silver. This piece has been cleaned and professionally polished so that it sparkles like new and includes original Tiffany pouch. Would also make a perfect gift for an anniversary, birthday, holiday, or ANY occasion in which you care to make a lasting impression. Weight: 74 grams Size: 16 inches Hallmarks: "Tiffany & Co 925"