How to fold a4 paper

Written by l.p. klages
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How to fold a4 paper
A4 paper folded into thirds will fit into a standard envelope. (envelope image by Peter Baxter from

A letterfold is a way to fold a sheet of paper so that the letter contents can be viewed when the envelope is opened. The simplest way to fold a sheet of A4 paper is to fold the paper in half or in thirds (an A4 sheet will fit in a standard envelope if folded in thirds). However, there is a more complex way of folding paper: the basic letterfold.

Skill level:
Moderately Easy


  1. 1

    Fold your paper in half along the shorter side, then unfold it, leaving a crease.

  2. 2

    Fold the halves on each side of the crease from the edge, toward the crease, so that they meet in the middle. If you unfold those halves there should be three creases and four equally large rectangles along the length of the paper.

  3. 3

    Hold the folded paper with the vertical seam of the two ends together, then fold from the top of the paper downward. Put the crease one-third of the way down the paper.

  4. 4

    Fold the paper over once more, this time at the two-thirds mark. You now have a compact rectangle that can fit into an envelope.

Tips and warnings

  • You can skip the first fold along the middle if you feel confident that you can execute the second step without that guide crease.

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