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It blows our hivemind that the United States doesn't use the ISO 216 paper size standard (A4, A5 and the gang).
Like, we consider ourselves worldly people and are aware of America's little idiosyncrasies like mass incarceration, the widespread availability of assault weapons and not being able to transfer money via your banking app, but come on - look how absolutely great it is to be European:
The American mind cannot comprehend this diagram
[Diagram of paper sizes as listed below]
ISO 216 A series papers formats
AO
A1
A3
A5
A7
A6
Et.
A4
Instead, Americans prostrate themselves to bizarrely-named paper types of seemingly random size: Letter, Legal, Tabloid (Ledger) and all other types of sordid nonsense. We're not even going to include a picture because this is a family-friendly finance blog.
A5 is not 15x10,5
If A4 is 291x210 then OBVIOUSLY the next one starts with 210: 210x148.
You’re right. Sorry for getting my post-7pm arithmetic skills on you. However, my point still stands. ‘Close’ is not ‘conforming’ to the standard.
Close to your non standard book measurements. I really appreciate the usefulness of ISO 216, witch is actually a standard.