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Width And Height Of US Letter Paper

Question asked by Jim:

I'm designing a poster for my business, but need to know the dimensions (width and height) of US letter paper. I believe US letter paper is slightly different to A4 paper (I saw your post about A4 paper size). Can you advise, please?

Follow-up responses...

US Letter Paper Dimensions

posted by Robert:

You're absolutely right, Jim - the dimensions of US Letter paper are different to A4 paper. The US, Canada (and parts of Mexico) are the only countries in the world that don't use the IS0 216 standard for paper sizes.

The standard for US Letter paper is defined by the American National Standards Institute (ANSI), where-as the dimensions of A4 follow the International Organization for Standardization (ISO) 216 standard.

The width and height of US Letter paper are:

  • In millimeters: 215.9mm x 279.4mm
  • In centimeters: 21.59cm x 27.94cm
  • In inches: 8.5in x 11in

US Letter Paper Dimensions In Pixels

If you're creating a Photoshop image file, the pixel dimensions will vary based upon the dots per inch (DPI) of the image. 72 DPI is standard for the web, but 300 DPI is standard for print.

  • US Letter at 72dpi: 612 pixels x 792 pixels
  • US Letter at 300dpi: 2550 pixels x 3300 pixels






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