Sterling Silver One Sided Seashell Necklace High Polished Chain with Oxidized Charm Height 13 millimeters (0.51 inch) x Width 14 millimeters (0.55 inch) Charm Weighs Approximately 1.6 Grams (3.4 grams including 18" necklace) Chain Thickness 0.7 millimeters (1/32 inches) Spring Clasp on Necklace