this post was submitted on 12 Mar 2024
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You can say 25 micrometers
Yes, it's technically correct (which we all know is the best kind of correct) and engineers would understand.
Using mm means most everyone (who knows metric) understands that in much more practical terms. A quarter of a tenth of thiiis much is a pretty damn tight fit.
Micrometers is actually so common that it has a colloquial non-SI name of "micron"
According to wiki:
Bold of you to assume that anywhere close to everyone who understands metric would know that 0.25 is a quarter of something.
Bold of you to assume that the country that still uses the Imperial system is the one that better understands fractions.
https://www.cbc.ca/radio/undertheinfluence/how-failing-at-fractions-saved-the-quarter-pounder-1.5979468
I didn't say that imperial countries understand them better.