Can’t change paper size when printing

Beginning about a month ago, the paper size when printing from my iPhone to my Canon printer is 3 1/2 x 5. There is no option to change the paper size. I read another answer that said it was the fault of their printer, which was an HP. I have heard of this happening to a lot of other people, so how can it be a printer issue? Any help from anyone?

iPhone 14 Pro Max, iOS 18

Posted on Mar 20, 2025 3:59 PM

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Posted on Mar 20, 2025 4:40 PM

iOS communicates to the printer to find what size paper it is loaded with, and it's the printer that's returning the 3.5x5" response that you're seeing when you go to print.


I know on my printer (a HP OfficeJet), when I load paper, the printer asks me to confirm the paper size that's loaded, and whatever I choose is what my phone sees when I try to print.


Check the printer's paper tray - especially see if it has a manual feed slot that's configured for the smaller print media. It could be that's what the phone is responding to.

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Mar 20, 2025 4:40 PM in response to TxEngTchr

iOS communicates to the printer to find what size paper it is loaded with, and it's the printer that's returning the 3.5x5" response that you're seeing when you go to print.


I know on my printer (a HP OfficeJet), when I load paper, the printer asks me to confirm the paper size that's loaded, and whatever I choose is what my phone sees when I try to print.


Check the printer's paper tray - especially see if it has a manual feed slot that's configured for the smaller print media. It could be that's what the phone is responding to.

Mar 21, 2025 12:39 PM in response to TxEngTchr

MacOS printing and iOS printing are not the same.


Yes, MacOS lets you dictate the page size you want, even to the point of specifying a page size that is, potentially, not valid for your printer.


Here's what I see, for example, from my Mac when I select a page size when printing to my HP OfficeJet:



Note the 'Loaded Papers' option at the top, where the Mac has queried the printer to find out what's loaded.


iOS, for better or worse, tries to streamline this, querying the printer for loaded paper size and offering that as the default, with no way to override it. Why? I don't know. Other than the page size it offers is coming directly from the printer itself (if I change the page size loaded in the printer, both MacOS and iOS update to reflect that).


So I maintain the small page size is coming from the printer itself. Have you tried resetting that? I don't know your printer, but on my OfficeJet the printer control panel asks me to confirm page size any time I load paper in the paper tray.

Mar 20, 2025 6:36 PM in response to Camelot

I can print just fine from my laptop. It shows that “letter” (8.5 x 11) is loaded when I’m on my computer. Prior to a month ago, everything worked just fine, and I could even change the size of the paper on my phone. It no longer gives me any other choice. The exact same thing has happened to my son‘s phone and a friend‘s phone.

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Can’t change paper size when printing

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