Letter or A4: which is a more sensible default?

I have a document that recipients are expected (or are likely) to print on their own. It is not clear whether the majority of users will be US or non-US, so there isn’t a clear preference for letter or A4 paper.

Assuming that I can’t know how many recipients will want letter and how many will expect A4, what would be the more appropriate page size to use for a PDF?

To put it another way: which will cause less issues for users:

  • printing a letter sized document using A4 paper


  • printing an A4 sized document using letter paper


I’ve found it best to target letter height and A4 width – i.e. the lowest common denominator solution.

Source : Link , Question Author : Scribblemacher , Answer Author : David Davies

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