875 embossed on clasp. 19” length. 2 mm thickness. Received as a gift: per Google: “Purity: "21k" means the chain is made of 21-karat gold, which is a high percentage of pure gold (\(21/24\) or \(87.5\%\) pure). It's purer and more valuable than lower-karat gold but also less durable. Delicacy: The herringbone style is very delicate because of its flat, V-shaped links, which can kink or bend easily with improper handling or storage. Authentication: Ensure the chain is real by performing a simple test, such as a magnet test (gold is not magnetic) or a scratch test (real gold leaves a gold streak).” Priced per average on Google Search for similar items: “The average price for a new 19" 2mm 21k solid gold herringbone chain typically ranges from $600 to $1,200, depending heavily on its exact weight and the specific jeweler. The price is primarily determined by the current market value of gold and the chain's gram weight. “ Its timeless design complements any outfit.