Fat Man

Weight: 10,213 pounds

Length: 10.7 feet

Diameter: 5 feet

The "Fat Man" was a much larger bomb, with its blast yield being slightly larger than the yield of the "little boy".  The fat man was an implosion type bomb.  It used Plutonium-239 instead of the Uranium-235 used in the "little boy".  This bomb was dropped on Nagasaki, Japan, on August 9th, 1945.