Printable mm ruler 2026

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  1. Click ‘Get Form’ to open the printable mm ruler in the editor.
  2. Ensure you print the ruler at 100% size by selecting the NO SCALING option in your print settings.
  3. Fold the printed ruler along the dotted line at the bottom of the page for easier handling.
  4. Position yourself 8 inches (20 cm) away from a mirror or a friend, holding the ruler against your brow.
  5. Close your right eye and align the zero mark of the ruler with the center of your left pupil.
  6. Open your right eye while keeping your left eye closed. Look straight ahead and read the millimeter line that aligns with your right pupil to determine your Pupillary Distance (PD).
  7. For accuracy, take multiple measurements and ensure consistency.

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Printable-Ruler.net provides you with an easy to use, free printable online ruler that will save you to ever look for a ruler again! For Letter as well as A4 sized paper, inches as well as centimeters. Due to the easy fold mechanism on the sides, the paper ruler can be used for measuring and drawing as well.
The thickness of a sheet of paper is actually very close to 0.1mm. Get a handful if paper about the size of the thing you want to measure. Add or subtract pages to get as close as possible. Count the sheets, divide by 10 and you have a mm measure that will be as close as a ruler measurement for small distances.
Go to File Options Advanced. Select the Show vertical ruler in Print Layout view under Display.

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