Well technically the locomotive has no size because it does not exist.......yet. The locomotive when built will be built to as close to the original WW&F #7 as we can get. Therefore the measurements will be about the same as the 7. 7 had 33" drivers, roughly 40" diam boiler, 18' wheel base, was 30' 7" long, 10' fall and about 7' wide. It had 11x14 cylinders, weighed 56,000lbs, and had a tractive effort of 8300lbs.