This lovely pendant is a coin shape carved of green and black kambaba jasper. It measures about 1-1/4 inch in diameter. Sterling silver chains are available for $11.50. The snake chain is 18 inches long. The rollo chain is 22 inches long. The wave chain is 24 inches long. These are finer sterling chains and not suitable for very heavy pendants. Black leather or suede cords are available for $2.50 additional. The leather adjusts from 18 to 20 inches. The suede cord is 24 inches and not adjustable.