DIY Geometric Straw Prisms – Fast & Easy Modern Christmas Tree Ornaments

Geometric shapes provide a timeless look and yet a modern update to any décor, including Christmas decorations. These super simple DIY geometric straw prisms are not only fast to make (especially after you do one or two), but they give such a fresh, contemporary vibe to the seasonal décor that you’re sure to love them. What’s more, this project is incredibly versatile – use whatever type and color of straw you want, and fit it to whatever shape makes sense with the rest of your décor. Here’s how you make them.

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Materials Needed:

  • Thin drinking straws (or natural straws or whatever you have/want in your décor)
  • Heavy duty thread or fishing line
  • Large yarn needle (thin enough to easily fit through the straws)
  • Scissors
  • Ruler

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Begin by cutting your straws into 2” lengths. The more precise and even these are, the happier you’re going to be with your geometric prism when it comes together. You’ll need twelve (12) 2” straw sections per prism.

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If you have scissors with a rounded cut part, that’s a simple and more accurate way to cut the straws because the arc holds the round straw in place as it’s being cut. Although a razor blade or regular scissors will work, too.

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Start by threading your needle with about an arm’s length of fishing line. It doesn’t need to be doubled, but if you want to double it, do two arms’ lengths. Note: This tutorial is using heavy duty thread instead of fishing line for this example so you can see it better in the photos. String four straw lengths onto your fishing line, about 4”-6” away from the end of the line. You don’t need to knot the end of the fishing line for this.

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Tie a square knot (right-over-left, left-over-right) so the four straws form a sort of diamond shape. You want the straws to be touching, but don’t pull so tight that you can’t see the fishing line in the joints; you’ll be using each joint later, so it needs to be loose enough to be still workable.

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Thread two more straw lengths onto your fishing line and push them near the top knot.

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Secure the fishing line to the bottom corner of the straw diamond. Don’t worry about trying to create the geometric shape at this point at all. You can either tie the fishing line at this bottom joint, or you can simply wrap the fishing line around the original diamond joint fishing line a couple of times to hold it in place.

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You now have three of your prism edges, and the fishing line is coming out of the bottom prism joint.

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Thread two more straw lengths onto your fishing line, and pull them gently to rest against the bottom prism joint.

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Secure the fishing line to the top joint by either tying another knot or wrapping the fishing line around the original diamond’s joint line twice.

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At this point, you have your four prism sides, the fishing line coming out the top joint, and a somewhat floppy-looking prism. Yes? Good.

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Thread your fishing line through one straw from the top joint to a side joint. Any straw, doesn’t matter which one you choose.

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Thread one straw length onto your fishing line and press it gently up to the side joint.

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Secure the fishing line to a neighboring side joint so that the single straw length creates a bridge between the two joints.

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You will not want to knot these side joints. Instead, keep the fishing line taut but not pulled too hard, wrap the fishing line first around the prism joint’s fishing line on the right side of the side straw (“a” in the photo), then wrap it around the fishing line on the left side of the side straw (“b” in the photo). This provides enough security in the joint to allow you to continue without anything moving too far out of place.

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Thread another single straw length onto your fishing line, and move the end to the next neighboring prism side joint. Secure. Repeat for the last two side straws.

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When the last side straw is secure, thread your needle back up through the straw toward your top joint.

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Tie a square knot at the top of your prism to secure everything in place.

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Then tie a loop to hang the prism from a Christmas tree.

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Here is what the geometric straw prism will look like with fishing line. It’s much more crisp and, well, geometrically clean than when the thread is visible at each joint.

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Hang the DIY ornament from your Christmas tree.

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The 3-dimensional nature of this prism is just charming, and even though the materials (red plastic drinking straws?) are not particularly anything special, they look amazing when configured in this way.

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We hope you enjoy making your own DIY geometric straw prism ornaments this year, and that these give your Christmas tree just the right touch of contemporary classic appeal. Happy Christmas decorating!