Saturday, February 18, 2012

A Quick and Simple Way to make Half-Square Triangles

Here's a quick tip to make half-square triangles. This was shared by one of the members in my small quilt group. She said she found in on Craftsy.  Great tip.  I've done this before but didn't know how big the half square triangles would be but the mystery is now solved....


A quick and simple way to make half-square triangles

1. Layer 2 squares of fabric right sides together and pin.

2. Sew ¼" seam around the entire square, stopping ¼" from each corner and pivoting with the needle down to sew the adjacent side.
3. Line up a ruler corner to opposite corner and cut the square diagonally. Being careful not to move the square, now cut diagonally in the opposite direction.

4. Open each of the four squares, press seam allowances toward the darker fabric, and trim the dog ears. Edges on these units are on the bias, so be careful not to stretch them as you press and sew.
How big should the squares be? Whatever size FINISHED half square triangle you want, add TWO inches to that measurement. For example, if you want a 2 ½” half square triangle (finished size 2”),you would cut your squares 4”.
2” finished – 2 ½” unfinished = 4” squares
3” finished – 3 ½” unfinished = 5” squares
4” finished –4 ½” unfinished = 6” squares
5” finished – 5 ½” unfinished = 7” squares
Make one set, cut them and measure to be sure your quarter inch seam is correct and they measure exactly what you want.

If you spray starch these or use Best Press by Mary Ellen, there should be no problem with bias edges or cut your squares to begin with on the diagonal. You will have bias edges one way or another, so just be careful and don't stretch.

2 comments:

Jen said...

I love that method for making HST's - but I don't think I ever knew how to measure for them! Thanks for the info!

quilt32 said...

I had also seen that method for making HSTs but didn't know the measurements. Thank you for sharing.
Lillian @ lillianscupboard.wordpress.com

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