This set of two dog tags come with chains.  The first dog tag is engraved with a "Cross w/flower, John 3:16."  The second dog tag is engraved "For God so loved the world, that he gave his only begotten Son, that whosoever beliveth in him, should not perish, but have everlasting life."
 
Each dog tag is about 50 x 29 x 1 mm/ 2 x 1.1 x 0.04 inches, and the round hole of the disc is approx. 3 mm/ 0.1 inch in diameter. They are sturdy and reliable, not easy to break or fade, and lightweight for wearing.