Text-Only Instructions -
Credits and Resources:
This is likely to be a traditional model.
Instructions with supporting pictures and/or illustrations can be found here at Square Letterfold Tutorial
Paper to be used: Rectangular, any size; any kind of paper will work for this model.
Square Letterfold Tutorial

 Folding level: Easy/Beginner
Steps: 10
Description:  This is a very secure, small, flat envelope or letterfold. It is often called the square letterfold, but to distinguish it from so many other envelopes, notes and letterfolds, I am calling it the "Diagonal Duo Letterfold" because of the diagonal "strips" that are evident on both sides of the folded square.
The closure of this letterfold is quite unique and it ends up looking the same on both sides.
The model is quite secure as long as you do not fill it with things that are heavy or bulky.
It can be used to enclose money, a gift card or anything that is small and fairly flat.
Alternatively, a note can simply be folded into this model and decorated for a quick children's project or a personal touch.
If using two-sided paper, lay your paper with the patterned or colored side down before starting to fold.
If a message is written on the paper, it should face up when starting to fold.
Step 1
Place a rectangular sheet down with the short edges at the top and bottom, or in the portrait orientation.
Step 2
Fold the top edge down to meet the bottom edge. Crease and leave folded.
Step 3
Now, fold the entire bottom edge, both layers of the paper, up around an inch or so. Crease well and leave folded.
You do not have a mark to guide you here.
Just try your best to make the fold as straight as possible.
Step 4
Turn the model over from left to right, like turning the page of a book.
Step 5
Fold the left edge over to the right to create a vertical crease line.  Crease well and unfold again.
Step 6
Next, fold the two bottom corners up toward the center, aligning the edges with the vertical crease line you have just folded.
Crease well and leave folded.
Two triangles will have formed nearest you.
Step 7
Fold the entire top edge down as far as it will go. It will cover the top of the triangles beneath it.
Crease well and leave folded.
Step 8
Turn the model over once more, from left to right.
Step 9
You will now have a large triangle with two tiny corners at the top left and right and a small pocket at its bottom point.
Take the two tiny corners and fold them diagonally up and away from you; unfold and then tuck them so they disappear between the layers of the paper.
Step 10
Finally, fold the left and right corners down to meet the bottom center point, forming a square shape;
Crease well and then insert both points into the little pocket on the corner of the square.
Tuck the points in as far as they will go and press flat to ensure your letterfold is neat and secure
Making origami accessible to visually impaired crafters through text instructions.
for non-commercial use only.
Compiled by Lindy van der Merwe, July 2021
Revised, April 2024
This text copyright 2024 by


  1. Dear Lindy, I am just reaching out having learned of the wonderful Aveuglami Project.Japanese folder, blind from the age of 12, Saburo Kase has traveled the whole world to teach origami to the blind. He left several articles which explain his teaching method.Saburo Kase died on April 11, 2008. We just wanted to ask if you have the instructions for The Fox & The Hound or perhaps The Cats and dragonfly? What a legend to of done such an incredible project. I'm currently raising awareness for The Guide Dogs UK and wonder if you have an audio accessible to blind and partially sighted. It's such a beautiful artistic creativity origami. Would you have any further details of the project please? Kindest regards, Natasha

    1. Hi Natasha, so nice to hear from you. The Aveuglami Project is, indeed, a wonderful project of Michel Lucas, building on his extensive work in the early 2000s with blind people in France. I am aware of Sensei Saburo Kase and his work and am always looking to learn more about him. The only models I have been able to find out how to fold, from the Aveuglami site, is the fox (listed as Hello Fox) and the Kase vase. I have translated and added to both these models, but the Kase vase is still being edited since I have had the priviledge to work on it with Michel Lucas. If you visit the page called "Links to other sites" on the main page of Access Origami, you will find two articles I have written for a site called Wonder Baby. The first tells of Saburo Kase as an intro to the article. There is only one audio tutorial on the main page of my site as present. All the other materials are in text-only format. If there is a need, I may consider making available more materials in audio format. Please feel free to contact me at I would love to talk more and enjoy working with others who share a love for origami.


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