Magic Metal Mermaid Siren Necklace Vintage Antique Victorian Silver Tone NN20 Charm Pendant Choker Fashion Jewelry Ships from the USA Mermaid Charm Necklace. Etched details and antiqued finish. Pendant Size: 1 inch. Length of Chain, Open from Clasp to End: 16 inches Makes a perfect gift. Search Magic Metal Jewelry for more jewelry styles.