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qst Block
Quarter-Square Triangle

The Quarter-Square Triangle (QST) is an extension of the Half-Square Triangle in as much as you have to create the HST in order to make a QST. I create QSTs much the same way I create cutting slightly larger initial squares and squaring up the completed unit. We will be making 2 3-1/2" units with these directions.

The rule for cutting squares for QSTs is to add 3/4" to the unfinished size of a square for the same area. For example...the unit needs to fit a 3" space, so you would cut 3-1/2" + 3/4" = 4-1/4" square. I can't create these units the same size to save my life, so I add an additional 1/8"-1/4" to be sure I don't get them too small...and to make cutting easier.

Posted: May 2001

Sample Quilt Layouts

Cut as follows:
Fabric Cutting Information
Neutral Cut 1 4-1/2" squares
Light Cut 1 4-1/2" squares

Sewing Instructions:

  1. Mark a diagonal line on the wrong side of the Neutral square.
  2. Match right sides together with Light square and stitch 1/4" on either side of diagonal mark.
  3. Cut apart on diagonal line and press open toward Light fabric.
  4. Mark a diagonal across the seam on the wrong side of one HST.
  5. Match HSTs...right sides together with Neutral matching to Light, stitch 1/4" on either side of the diagonal mark.
  6. Cut apart on diagonal line and press open toward either way.
  7. IMPORTANT: Please square up your finished unit to be sure it is 3-1/2". If it is larger or smaller, check your seams and redo if necessary. If you do not check your measurements, your block may not join properly with other blocks easily to create a finished quilt.

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Copyright © 2001 Quiltaholics
Holliston, MA
Last Updated 1May2001.

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