Sterling Silver One Sided Treble Clef Music Note Necklace Polished Silver Chain with Oxidized Charm Height 23 millimeters (0.91 inch) x Width 10 millimeters (0.4 inch) Charm Weighs Approximately 1.1 grams (2.9 grams including 18" necklace) Chain Thickness 0.7 millimeters (1/32 inches) Spring Clasp on Necklace