All chains carry a full Hallmark for 9ct gold. 3.58 gms all lengths are 2.38mm in width. PLEASE NOTE PHOTO IS A CLOSE UP TO SHOW DETAIL AND NOT ACTUAL SIZE PLEASE REFER TO ABOVE DESCRIPTION FOR FULL DIMENSIONS. Gold and Platinum chain Specialists. Silvermarius has been supplying quality Gold and Platinum jewellery online for nearly ten years.Sourcing only from the best manufacturers within the U. We offer a wide range of quality items at extremely keen prices.