acolchado half square triangle HST sampler quilt video tutorial

Quick accurate and flexible half square triangles (HSTs) technique

This is the last video tutorial in the series Quilting in 2021.

Half square triangles are essential in quilting. There are many ways of making them.

Some have bias seams some don’t.

This particular method produces 48 half square triangles though you can adapt it to make as many or few HSTs as you like.

 This is a very easy technique that produces many HSTs at once.

HST finished size

3″ x 3″.


2 fabric rectangles 16″ x 24″ each in contrasting colours.

Medallion mini quilt

To make this mini quilt you need 36 HST.

Make 48 HST at once

My book Turnabout Patchwork

“Turnabout Patchwork. Simple quilts with a twist” is all about playing with blocks – making a block, slicing it up, and turning or repositioning the pieces to make a completely different block (sometimes two smaller blocks) to yield endless quilt tops.

See all the quilts in the book in a real life project

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Share your work!

If you make any of my tutorials this is how you can share your pictures:

  • On Instagram please tag me with @teresadownunder and hashtag #teresadownunder
  • Join my Facebook group and post your pictures there

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  1. Do you have a pdf for this video? I would like to print out and have next to me at my cutting table so I have the drawing template sizes written down. Are the sizes 16×24 and the squares 3-5/8″ for measurements, or 16.25×24.25? Thanks, I love your website.

    Liked by 1 person

  2. I don’t have my written instructions. As for sizes you can use the two at once half square triangles charts provided by other quilters.


  3. These HST are so versatile…….I’ve just made 440 of them which I’ll turn into QST’s…….I’ve got the 2 1/2″ HST “paper” to stitch….. some busy days ahead to keep out of mischief………….. Cheers, Elizabeth


  4. I love this and have shared with many friends, as a reminder or as something new.
    Thank you for,sharing you talent yet again. I love all the fast motion placement ideas you give us from just hst add in a quick and simple way

    Liked by 1 person

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