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Half Square Triangles Sewing Tutorial

By: Chris Hammond for allfreesewing.com
Half Square Triangles Sewing Tutorial
Half Square Triangles Sewing Tutorial
This image courtesy of AllFreeSewing.com

Half square triangles are an excellent pattern to know how to make because it can be incorporated into so many different sewing projects. This Half Square Triangles Sewing Tutorial breaks down exactly how you can become an expert at making perfect half square triangles. As long as you are comfortable using a sewing machine, you are 100% ready to take on this tutorial. Plus, the corresponding video is a great for helping out all of you visual learners!

Project TypeLearn a Technique

Time to CompleteUnder an hour

Sewn byMachine

Easy

Materials List

  • Cut fabric
  • Pins
  • Rotary cutter
  • Marking utensil
  • Ruler
  • Cutting matt
  • Sewing machine
  • Ironing board
  • Iron

Half Square Triangles Sewing Tutorial

Half Square Triangle Tutorial Instructions

  1. Lay your two pieces of fabric on top of each other right sides together. 

  2. Using your ruler, makr a line from on corner to the next. Really focus on reall making that mark corner to corner. 

    Tip: For extra measure, you can place one pin on each side through your fabrics to help hold them together. Be sure to palce the pins far away from your line. 

  3. Sew a scant quarter of an inch on either side of the line.

  4. Sew on either side of the line you made a scant quareter of an inch. Pull your fabric out when you reach the end, rotate it, and repeat. 

    Pro Tip: take a piece of washi tape, and using a tape measure, measure exactly where a quarter of an inch is on your sewing machine. You can usi this as a guide as you run your fabric along the sewing machine. 

  5. You can remove your pins now that you have finished sewing. You are going to want to use your ruler and your rotary cutter to cut down the line that you previously drew. 

  6. Set your seams by giving them a quick run over with your iron. You now want to press your seams to one side.

  7. Line up your fabric and ruler so that they are both at a 45 degree mark. Then, using your rotary cutter trip the edges that are sticking out from your ruler.

  8. Repeat step 7 with the other side of your square, and your other square.

  9. Now you have a perfectly pointed half square triangle! 

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If you have never made or had trouble with your half square triangles squaring then you need to watch this video. This is very good advice on how to square it which can make or break your quilt. I did not do mine right and so my quilt will not be made yet. This is a very important step to make them. You can do so much with these squares so take the time to learn how the right way. There is a tutorial too. Any other advice?

Thank you for this great tutorial, it is always nice to have such great instructions! These half square triangles can be used for so many projects, and they really look clever as a pennant streamer, using several in a row on a rope or streamer, spelling out a message or name. This technique is so helpful and will help make them quickly. Thanks for sharing!

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