Is 6.9mm wide and is 1.1mm thick. Tested by a jeweller, the chain is fully stamped. With 375 (9ct) as the pictures show.We appreciate your business and kindly invite you to visit our store. Southend Discount Gold - Southend-On-Sea, Essex. For many more beautiful items, both new and unique pre-owned jewellery and watches. Come visit us and we'll make sure you'll get the perfect item and the best deal. If we can be of any further assistance, please do not hesitate to contact / visit us! The photos attached were taken on the day of the listing and are a true reflection of what is on offer and its condition. All items are guaranteed to be as described. The item must not be used, resized or damaged in any way.