AircraftOperations
I seem to remember thinking the hold was about as high and wide as an AN-124, but just a bit longer.
This is correct. It has the same cross-section, in fact it is a streched AN124 with modified wing and tail (and no rear ramp door!). Cargo cabin volume is only 25-30% bigger than AN124, while max payload is double. Not good for volumetric cargo, but main battle tanks are not bulky