Hello how may I help you? I'm trying to find out something. What do you want to know? I need to know what the biggest cloud ever was. Ok I can do that but first, do you mean tallest widest heaviest? What kind of cloud? I don't know, like just the biggest overall. Ok. Does it have to be a specific kind of cloud or any cloud? Any cloud ever. Even if the cloud was pink? that would be an extra treat. The biggest pink cloud in the universe is the OMEGA FLUFFY cloud. It is 400 miles long and 500 miles tall.