25 blank military style rolled edge dog tags with a matte finish. These are the same dog tags that the military uses with approximate dimensions of 2.9cm x 5.1cm with a hole diameter of 0.4cm . Dog tag chains sold separately (we also have separate listings for dog tags that come with chains and dog tag silencers). Ball Chain Manufacturing is ISO 9001:2008 certified by the International Organisation for Standardisation and is also recognised by the Green Business Bureau as a certified "green business". Ball Chain Manufacturing is the largest manufacturer of Ball Chain in the world and the only company that manufactures its chain in the United States. Our chain is everywhere, and our quality is second to none. Don't settle for low quality overseas imitations. Whatever the application, this chain will last.