The MOAB is 30 feet, 1.75 inches (9.17 m) long, has a diameter of 40.5 inches (102.9 cm) and weighs 22,600 lb (10.3 tons) (of which 18,700 lb (8.5 tons) are high explosives.) Its blast radius is 450 feet (137.16 m, 150 yd), though the massive shockwave created by the air burst is said to be able to destroy an area as large as nine city blocks. Due to its large size and weight, it was designed to be dropped via parachute extraction out of the back of a C-130 cargo aircraft.
There's a reasonable write up here... Massive Ordnance Air Blast bomb (MOAB)
