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