What is the smallest unit of length that can be meaningfully measured?

Factual Questions
21

[QUOTE=BrainGlutton]
What is the smallest unit of length that can be meaningfully measured?
[/QUOTE]

Howard Stern’s penis. BABABOOEY! BABABOOEY! BABABOOEY!

(hangs up)

22

[QUOTE=Chronos]
(electrons are believed to actually be true point particles, but things like that can’t generally be experimentally confirmed: All we can say is “it’s smaller than so-and-so”).
[/QUOTE]

I believe the word you’re looking for here is breadbox.