Tiffany & Co Sterling Silver Return to Tiffany Signet Heart Ring Size 5.75. The ring is in good used estate condition and ready to wear. There is evidence of wear, please see pictures for details. The ring is signed "Please Return to Tiffany & Co New York 925" on the rings face and "Tiffany & Co AG 925" on the inside. The ring is a size 5.75 and weighs a total of 6.1 grams. The heart measures 11mm x 11mm.