Unisex. With a secure glued and pressed sterling silver lobster claw clasp. Width is aprox. 2.5 mm. Delicate feeling on your skin. Great quality silk satin cord makes this piece a great complement for your unique favorite pendants and charms. Different lengths, you choose: 14, 16, 18, 20, 22, 24, 30, 36 or 40 inches long.