The Lovery Rainbow Bead Rondel Necklace is in 18K Gold Plated Over Brass with an adjustable chain length of 12.5-17 inches. This piece features rainbow beads, measuring approximately 6.5 millimeters and a rondel measuring approximately 7 x 14 millimeters (0.25 x 0.55 inches). This piece is identical on both sides and is finished with a lobster clasp.