We know they have at least one printer on the ISS – that's NASA-supplied so it would be in the US Orbital Segment. Presumably there is a printer in the Russian Orbital Segment as well. (Mir had a teletype.)

My question is – what paper size do they use on the ISS – A4, US Letter, or a mix? I assume that if Roscosmos has a printer they'd want to load it with A4; but would NASA use A4 in their printer so the whole of ISS uses a standard paper size? Or would they stick to US Letter since that's what NASA is used to?

(Also, I guess there is some argument that something called the "International Space Station" ought to prefer the international standard paper size.)

  • $\begingroup$ different but related: Was this printer shown the ISS in 2015 built specially to work in microgravity? $\endgroup$
    – uhoh
    Mar 25, 2021 at 13:24
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    $\begingroup$ I like this question, but I can't help but wonder - what motivated you to ask it? $\endgroup$
    – SF.
    Mar 25, 2021 at 14:29
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    $\begingroup$ They use it to print out procedures, which on the ground are US letter, but I can't find anything to confirm that's what is used up there. Cool question! $\endgroup$ Mar 25, 2021 at 19:20
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    $\begingroup$ IMO, a useful answer will primarily address the physical paper sizes available on the ISS, as virtually all "modern" printers can handle a plethora of formats... $\endgroup$
    – Digger
    Apr 25, 2021 at 14:33
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    $\begingroup$ @Starshipisgoforlaunch please stop making inconsequential edits to the question. "My" is fine. "So, my" isn't different (and I know for a fact that there are people who consider it incorrect). $\endgroup$
    – Erin Anne
    Feb 22 at 19:33


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