[Magnum44]

Jumping on the band wagon:

“5 to 8 kilometers in diameter” = BIG

“15 to 20 kilometers per second” = Really Fast

“thousands of cubic kilometers” = A WHOLE LOT

“metric tons” = HEAVY

“100 kilometer-wide” = Bertha Butt Wide

:)

[Windflier]

Those are the exact mental conversions I use to understand metric ;-)