Dreambell 2 pcs 925 Sterling Silver 2.5mm Link Ring Chain Extender with Spring Trigger Clasp 3 Inches Materials: 925 Sterling Silver (Stamped) Color: Bright Silver Size: (Ring) ~ 2.5mm x 4mm with 0.5mm (24ga gauge) wire Length of chain is ~ 75mm (~ 3 inches) , ~ 2.5mm wide the Spring Ring Clasp is ~ 5mm in diameter