Rockin Beads 12 Pack Silver Plated Lobster Clasp Link Chain Necklaces 18 Inch Silver Plated Lobster Clasp Textured Link Chain Necklaces 4.2x2.8mm, 20" chainApprox:4.2x2.8mm, 18" long, 0.7mm thick Pack of 12 Rockin Beads (TM) Brand comes with Rockin Beads Size Gauge Card