My coworker looked at me like I was crazy. "The what?"
"The normal printer paper, the 8.5 by 11 inch paper"
"Why do you know the exact size of printer paper??"
I did not know how to respond to this question.
I've never seen it in any office or stationary shop in Europe. It's available online, at a premium.
Thus HP printers continually displaying "PC LOAD LETTER" on printers outside the US dealing with documents generated by people in the US.
Only if there is an issue with the rollers or something and it can't feed the paper from the paper cassette. No one ever wants to read the manuals or do basic troubleshooting though. Hell newer ones have a menu on them that will walk you through each of the troubleshooting steps, but people would rather put a post-it on it saying it's broken.
For anyone else curious as I was: Mexico is the 4th country, and I don't believe there are any others (but I could be wrong).
If I format the page size, Libreoffice does offer "Letter" and "Legal". GIMP shows them as "US Letter" and "US Legal" but again they're not the default.
It wouldn't surprise me if most non-US users hadn't seen them at all, and certainly not that they don't realise the US uses a different size.
In most cases it still doesn't matter, either because software defaults to scaling to fit, or else because the margins are large enough that it works out even if printed in true size. But sometimes stars align and then you learn about those weird paper sizes.