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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.
Wait, the US genuinely doesn't use A4 etc.?
Letter paper (8.5" x 11" | 215.9mm x 279.4mm) is kinda sorta pretty close to A4 (8.27" x 11.69" | 210mm x 297mm) so without having the two next to each other, it can seem like A4 is just a funny piece of letter, and vice versa. But to answer the actual question, USA and Canada (and apparently the phillipines???) use the "North American Standard" which is a terrifying mess in comparison to the beauty that is the ISO standard.
Edit: typos
Tbf, I can see the use case for some "non-standard" sizes, like Legal, where having more height to the page without the extra width might be useful for readability of long documents.
...can't think of an excuse for the rest, though.
As a European, I do appreciate Legal as a format.
It just happens slightly too often that an A4 is not long enough and the last bit, including the signature, goes to the next page.
I wish Legal was common here. Or perhaps we could get a Long A4 with a third extra height or so.
The Letter format should just be replaced by A4 though.
As a European, haven't you heard about the existence of the B and C series of paper sizes? It may not be exactly what you have in mind, but B4 paper is 250 x 353 mm (9.8 x 13.9 in) and C4 paper is 229 x 324 mm (9 x 12.8 in). There's also elongated A which is really long.
I hope you appreciate the irony of an American telling you about them.
There's also scrolls, if Elongated A isn't quite enough.
Tried these but my printer always gets caught on the wooden handle things ๐๐คช
Time to update to a fax machine then!
https://www.possupply.com/other-pos-supplies-accessories/fax-paper-rolls-ribbons
I do miss the continuous form paper used with dot matrix printers.
It made banners easy, and I could make snakes out of the edges.
Burn the unbeliever!
As your links explain, C series is used for envelopes, while B and elongated A are special case that aren't commonly used.
In any case, none of those series has an equivalent to American Letter.
The only paper that you will commonly find in European offices are A4 and (to a lesser extent) A3.
A big office printer might have 4 trays stocked with A4 and one tray with A3, for example.