Rhodium On 925 Sterling Silver Rubber Stopper Bead Adjustable Box Chain Necklace Bracelet Extender 2" Materials: Rhodium On 925 Sterling Silver Size: each chain is approximately 52mm /2 inches long, about 1mm thick; ball is about 4mm in diameter; Stopper is approximately 7.5mm in outside diameter Hole size of closed ring is approximately 2.6mm with 0.7mm (21ga gauge) wire Quantity: 1 set