Chain By the Yard (36inches, 3 feet = 91cm) Brass Curb Linked Chain Approx 5.5mm Wide and 1.5mm thick. Large link is approx 8mm Long and 0.8mm thick, small link is 4mm long and 0.8mm thick. This Chain is Soldered and plated. Colour will Last Approximatley 8-12months. Longevity depends on the person wearing, as well as how they treat their products.