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The sonobe unit is the base of modular origami. You can make a wide variety of geometrical shapes just by putting these little Sonobe units together. Some designs call for less than five units, while some call for more than a hundred! Fortunately, Sonobe units are easy to make, especially with the instructions and pictures below.

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EditSteps

  1. Make a Sonobe Unit Step 1 Version 2.jpg
    1
    Take your square piece of paper with the white side up if you are using origami paper with one colored side.
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  2. Make a Sonobe Unit Step 2 Version 2.jpg
    2
    Fold the paper in half vertically.
  3. Make a Sonobe Unit Step 3 Version 2.jpg
    3
    Unfold the paper so you have a crease going down the middle.
  4. Make a Sonobe Unit Step 4 Version 2.jpg
    4
    Using the middle crease as a guide, fold the two sides parallel to the middle crease and fold them into the center. This will make the paper fold into fourths.
  5. Make a Sonobe Unit Step 5 Version 2.jpg
    5
    Unfold the paper once again.
  6. Make a Sonobe Unit Step 6 Version 2.jpg
    6
    Take the section on the left and fold it over.
  7. Make a Sonobe Unit Step 7 Version 2.jpg
    7
    Fold from the bottom left corner to the crease parallel to the right side of the paper. See image for further guidance.
  8. Make a Sonobe Unit Step 8 Version 2.jpg
    8
    Unfold all of the paper. There should now be a couple of diagonal creases, don't worry, this will make the process easier for later steps.
  9. Make a Sonobe Unit Step 9 Version 2.jpg
    9
    Turn the paper 180 degrees so that the diagonal creases are on the "top" of the paper.
  10. Make a Sonobe Unit Step 10 Version 2.jpg
    10
    Repeat steps 6 & 7 but do not unfold.
  11. Make a Sonobe Unit Step 11 Version 2.jpg
    11
    Fold the white flap over.
  12. Make a Sonobe Unit Step 12 Version 2.jpg
    12
    Turn the paper 180 degrees, then take the bottom left corner and tuck it under the white flap.
  13. Make a Sonobe Unit Step 13 Version 2.jpg
    13
    Turn the almost-finished unit over. Then fold in the extending white parts.
  14. Make a Sonobe Unit Step 14 Version 2.jpg
    14
    Fold the two extending points to the corners in which they meet the rectangular part.
    • At this point, you may be done, but there are other ways to fold the unit so you can make different polyhedrons.
      • Do not add any further creases to create a cube.
      • Add a mountain crease through the middle to make a hexahedron.
      • Add a valley fold through the middle to make more complex polyhedrons such as a icosahedron, or even more complicated things.
  15. Make a Sonobe Unit Step 15.jpg
    15
    Done!
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EditVideo



A simple video tutorial on how to make a sonobe variation, also explained in the "Tips" section. It also shows you how to assemble a simple hexahedron. At 5:30, you would only need 6 units, and at 5:47, only 30 units are needed.

EditTips

  • Here is also a variation you can do to make your model striped:
  • Add precise folds to make the model easier to assemble and more attractive. Precision folds require the creator to measure twice to fold once. Crease the paper with a thumbnail or the side of a ruler to make a sharp crease.
  • There is an infinite amount of polyhedrons you can make with this unit, start with a simple one, then more complex, more complex, and so on. (It's even possible to make one with 900 of these!)

EditWarnings

  • Be patient, you don't have to finish this in a day. (although one unit only takes 3 minutes to make)
  • Beware of paper cuts!

EditThings You'll Need

  • Multiple pieces of paper (preferably a multiple of 3)

Article Info

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Categories: Featured Articles | Origami

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