EFYTAL Star of David (outline) with Initial Necklace, Sterling Silver with Birth Month Charm of Your Choice 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'' (10 mm) Materials: Sterling Silver chain and pendants, Birth Month Charm. EFYTAL stands by the quality of our metals.