How to Make Square Envelopes


Making your own envelopes is a good way to overcome issues with odd-shaped cards that don’t come with their own envelope. Most envelopes are rectangular, so it can be hard to find one to fit a square card or other square object. You can personalize it and jazz it up with embellishments like glitter, rhinestones, stamps and stickers.

Things You'll Need

  • Card paper
  • Pencil
  • Ruler
  • Compass
  • Scissors
  • Paper
  • Glue


  • Estimate the dimensions of your envelope. It should be roughly the same as the square card or item you are sending. Draw a square to those dimensions onto the card paper using the ruler and pencil.

  • Place the point of the compass in the middle of one side of the square, then adjust the pencil leg to the corner point of that side so that the pencil end sweeps from one corner to the other. Draw a semicircle onto each square side that covers the entire length of the side.

  • Cut out the template, cutting around the semicircle lines only. You can make multiple square envelopes in uniform size from this template.


  • Trace the outline of the template onto the wrong side of the paper you are using for your envelope and cut it out.

  • Fold each semicircle flap over where the imaginary lines of the square center are—the original template will still have the square lines on it, so use this as a guide. Fold with the wrong side facing up so that when you fold the flaps over, the right side comes to the front.

  • Choose two opposite flaps and fold them down. Place a dab of glue along the lower half of the circle flap. Fold the flap that corresponds to the lower half over them so it is glued in place. Leave the remaining flap open until you have inserted your card and are ready to seal the envelope. Seal it with a bit of glue or a decorative sticker.

Tips & Warnings

  • Instead of using semicircular flaps, you can use triangular, rectangular or even scalloped edges.

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  • Photo Credit a blue envelope with yellow sun and a striped shee image by Milissenta from
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