Approximately 9mm copper plated brass reversible cloverleaf connectors with approx 5mm circle for gluing or stamping. Diamond/square on reverse side is also great for glue or metal stamping. 1.8mm thick. Four 1.8mm inner diameter loops. JBB Findings is a major manufacturer of high quality jewelry findings & supplies. Stampable and gluable. Can be used as links or multistrand connectors. Overall measurement includes loops.