These anchor cufflinks are solid sterling silver. Each anchor is approximately 30mm (1.2 inches) long. The cufflink attachments are the easy and secure swivel back style. They have been stamped with a '925' stamp to guarantee the metals silver content, as well as my own makers mark (WLG). They are handmade in my studio in Melbourne, and come packaged in a beautiful black box. All our shipping is FREE of charge.