EFYTAL Bird Initial Necklace with Birth Month Charm - Dainty Personalized Monogram New Mom Gift TO CUSTOMIZE: Click on the yellow 'Customize Now' button on the right LENGTH: 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 - 3/8'' x 5/8'' (1cm x 1.5cm) MATERIALS: Chain: Sterling Silver. Pendant: Silvertone. EFYTAL stands by the quality of our metals. Stone: choose your own Birth Month Charm