The Big Boy was one of the largest and strongest Steam Locomotives ever build, designed by the American Locomotive Company Shops, the Big Boys had a combined loaded weight of about 1,250,000 pounds. Now you can buy yourself or your special someone a necklace designed to match the drivers on the famous Big Boy Steam Engine down to the 1/60 of an inch. The necklace's diameter is about .9", 1/75 of the original 68" driver, and is about 1/10 of an inch thick available in Silver, Gold, Brass, and many more materials.