EFYTAL Initial Necklace with Starfish and Cultured Pearl - Personalized Beach Jewelry TO CUSTOMIZE: Click on the yellow 'Customize Now' button on the right Chain: 16" (40.6 cm) or 18" (45.6 cm). The chain is dainty but strong, and will not break. Efy Tal Jewelry (manufacturer) will always replace it for you if needed. Dimensions: Pendant Diameter - 3/8'' (10 mm) Materials: Chain: Sterling Silver | pendant: silvertone, freshwater cultured pearl. EFYTAL stands by the quality of our metals.