It is actually smaller than the Airbus Beluga
Source: https://en.wikipedia.org/wiki/List_of_large_aircraft
Source: https://en.wikipedia.org/wiki/List_of_large_aircraft
> With 30% more capacity than the existing Beluga, it will be able to carry two A350 XWB wings instead of one.[5] Its new fuselage is 6.9 m longer and 1.7 metre wider than the Beluga, and it will be able to lift a payload 6 tonnes heavier.
That list isn't in order of size.