EFYTAL Musical Note Necklace with Initial and Birth Month Charm Specify Initial, Birth Month Charm, and Chain Length in 'GIFT MESSAGE' field. (Select gift option at checkout) 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'' Materials: 14 Kt Gold Filled chain and pendant. EFYTAL stands by the quality of our metals. Choose your own Birth Month Charm