Personalized Heart Photo Locket Keychain with Crystals - Free Engraving Matte Silver Heart Photo Locket Key Chain with Crystals. Please email or contact us through amazon to submit your engraving information within 24 hours of purchase. Free Engraving includes 2 lines of text, 15 characters per line. Keychain measures 1 1/16 wide"" x 1 5/8"" tall and includes a 1 3/8"" diameter split ring attachment. 15 different engraving fonts to choose from