>>>Hi,
>>>
>>>My Euro customers says a forms that my app prints needs to be "adjusted" to their paper size A4. I tried printing the same form to my printer, selecting the paper size A4 and I don't see a difference. Of course, my actual paper is 8.5" by 11".
>>>
>>>What do you suggest I need to do - or emulate - their "issue"? How do you deal with this, if you have Euro customers?
>>>
>>>TAI
>>
>>https://uk.onlinelabels.com/articles/what-s-the-difference-between-a4-and-us-letter-paper-sheets.htm
>>in a nutshell, in portrait orientation, A4 size paper is slightly narrower and slight taller than US letter size
>>letter size: 8.5" x 11"
>>A4: 8.27" x 11.69"
>>where you're most likely to see the problem is with print going outside of the printable area (i.e. it gets "cut off" near the edge).
>
>Nice article. And thank you for the explanation regarding the printable area.
>I think the entire world should conform to the American standards (just kidding)

Paper size is one of those things I have to deal with in my hobby activities -- I like to build papercraft models. As papercraft modeling is generally more popular in Europe and Asia than in the USA (where the preference tends to lean toward injection-molded plastic models), most of the models I end up downloading are designed for A4 size paper. Attempting to print on US letter size paper or cardstock results in some problems:.
* unless designed to allow for both A4 and US letter, there's a risk that after printing some parts may end up outside the printable area of the page.
* when there are "front" and "back" sides that need to be printed -- different page size also means the printing of front and back don't align
* rescaling to page may work to keep parts from going off the page, it could also mean problem with the parts fit because the individual pages weren't scaled consistently (especially a problem when the separate sheets appear as separate files)
* Printing on the correct-size paper would seem to obviate scaling and alignment problems -- though there is the issue of getting the paper. Haven't found many vendors in the USA that will sell A4 size paper. Ordering from overseas would be required -- though in most cases there's likely a minimum order size (e.g. a ream or worse an entire case), then shipping charges due to weight could make that pricey (aside from that I'll end up with more than a lifetime's worth of paper).
* Even if I could get the right size paper -- the printer may not be equipped to handle it (in stock configuration), and may require me to special-order an additional feed tray (if available) to handle alternate paper sizes.