I don't have any concept of measurements in metric, so I asked a bunch of people from other (metric using) countries to tell me how big things were in metric units.

Thiago says he is about 0.0017 kilometers tall.

Mauricio thinks the table is about 20 kilograms. Phil thinks it's about 18 kilograms. Genti disagrees and thinks it's probably heavier.

Genti's niece is roughly 0.016 cubic meters in volume. Phil's oldest son is between 0.012 and 0.013 cubic meters in volume.

In conclusion, "the metric system is the bomb."