Chain By the Yard (36inches, 3 feet = 91cm) Brass Curb Chain Approx 3mm Wide, 1mm Thick. Each link is approx 3.5mm Long and 0.4mm 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.