How long is that thing?
A foot.
How long is that?
About as long as a foot.
Oh cool, I have two of those to compare right here. Thanks for telling me how long stuff is in an easy to understand way.
What about that thing?
30 centimeters.
How long is a centimeter?
A hundredth as long as a meter.
How long is a meter?
As long as the distance light can travel in a vacuum in 1/299752458 of a second.
Please throw yourself off a bridge for using bizarre measurements developed by frenchmen.