Making Custom Envelopes

by Jean Laverdiere

Here is how to make an easy envelope template for an odd sized card:

To determine the size of the paper you need to make an evelope, what is the size of your card?

Divide the width (east/west) in half. Add that plus a half inch to three fourths inch then times that by 2. Now re-add the original width.

For the flaps (north/south), you just need to add 1 1/2 inches to the top and bottom. That would be a total of 3 inches added to the original height.


So if you have a 6 inch square card, half of that is 3 inches, add to the 3 inches 1/2 inch then times by 2 = 7 inches. Add to the 7 inches the original size of 6 inches and your paper should be 13 inches wide.

For the height, you are looking for the top and bottom flap. The bottom flap is what will hold the side flaps together. Each flap would be an 1 1/2 inches and you need 2 so you need to add 3 inches to the original card size of 6 inches making your height of your paper 9 inches.

Total paper size would be 9 inches by 13 inches.

custom envelope diagram 1

Lay the card down in the center. Make sure you have the card centered with the proper margins at the north/south and east/west sides.

Fold over the east and west sides. There should be an overlaping of the sides in the center. Unfold.

Fold up the south flap.

Fold down the north flap.

Now cut the corners out to reduce the bulk (where the x’s are in the diagram).

custom envelope diagram 2

I clipped the south corners diagonally.

You can use a corner rounder punch if you desire on the north/south flaps.

Lay the card down in the center. Fold over the east and west sides but don’t fold over too tightly. Leave a bit of slack so the card will slide easily in and out of the envelope.

Glue one of the edges down on the other.

Fold the bottom flap up, again, leaving a little slack for an easy slide.

Glue the bottom layer over the east/west flaps to hold the envelope together.

Test to see if the card slides in and out with ease.

When ready, put the card in the envelope and glue down or shut with a sticker.

custom envelope finished

Recycle calendars, brown paper bags, or use gift wrap to create envelopes.

Iron tissue paper onto freezer wrap to create envelopes also.

Reminder that postage on odd sized envelopes costs more. Some people just put the odd sized envelope in to a regular sized one and mail at the regular price.

Example: a 4×4 square fits into a 5×7 envelope.

8 responses to “Making Custom Envelopes

  1. Barb

    Thanks, such a good tut. I will share the link with my paper arts friends

  2. Digi-Scrap_Cyndi

    Very nice, layout on this: I believe it helps people realize just how easy it is to make your own envelopes. A friend long ago taught me how to trace envelopes & well being creative like I am, I’ve had to make my friends envelopes like this for special invitations: as she didn’t have any envelopes.


  3. This is so logical, yet I needed you to post it. Thanks again!


  4. Aunjuli

    What an awesome explanation! Exactly what I’ve been looking for!

  5. pat stevens

    thank you for your help made cards for Christmas
    can’t find envelopes with your help I may survive
    this new endever of making my own cards.

    Thanks Pat

  6. Lessa

    Thank you! terrific instructions and tips.

  7. Thanks for the tut. Great help.

  8. Thank you so much for posting this! This is exactly what I needed for some baby shower invites I am working on.

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