Really Easy Half Square Triangle Blocks

Do you have trouble making HSTs? I think my method is really easy. No dog ears no cutting out squares and sewing down the middle on each side of a line.

A mini cutting mat or a turntable cutting mat would be good. You can cut without a mini but it would make it easier to do.

You will need a template of whatever size you are making. If you don't have a template you can cut one from stiff cardboard or template plastic but these will be prone to getting cut. And the corners may not be accurate with cardboard or thin plastic.

But you won't have to buy any thing to make your HSTs. No paper piecing or Thangles or any other expense.

If you haven't seen my thread then here is my link for free templates. If you need a size other than any of these just let me know.


We make these up ahead and then have them on hand for whatever I decide to make. This works well with scraps too. I just make two piles one dark colors and one light and then I take one of each and sew them together and then cut out the square from the center. You can sew them like flags and it goes pretty quick. Then we go back and cut out the squares. Any leftovers can be recycled.

Ok here we go. Here is my cut down version for making Half Square Triangles.

I used a 2 1/2" template and cut my strips 2 1/2" x 11"
This will give you 5 HSTs. Youcan make your strips longer but this works well for me.

Turn your mat and cut along the next side
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Sew your two strips together
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Iron the seams open for a flat surface
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Place your template on the strips at the bottom. Place two corners on the seam. Make sure your corners are accurately placed for a better HST
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Cut along one side
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Continue turning the mat and cutting as you cut the other two sides
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  1. Wow very fast. Thanks for sharing

  2. you are so awesome. I'm going to try HST with the 2 and 1/2 inch as the smaller one was to awkward for me to 'begin with.

    1. I'm happy to share any quick and easy methods. I hope you enjoy using this way of making HSTs. You can use any size of template to make them.