25.5mm x 6mm. Nunn Design charms are cast in pewter in the United States and plated in precious metals. mfcs-b The Laugh Necklace features Nunn Design silver plated components including Mum Charm, Nunn Design Flat Tag Grande Thin Rectangle Link (2-hole), Nunn Design Elongated Heart Charm, Nunn Design Antique Silver Bird Charm, Nunn Design Key Toggle Bar Antique Silver.