Setting Triangle Correction For Smaller Size Mystery

Below are the instructions for making the setting triangles cut at 8 3/4" larger.

  • Cut a strip 1" wide and 10 - 10 1/2" long (10" is the bare minimum and will give you exactly what you need with very little waste.

  • Fold both the strip and triangle in half and pin. Line up the half way points.

  • Sew a scant 1/4" seam.
  • Press toward the strip.

Place the point of a square ruler on the 90 degree point on your triangle and trim.


  • The long side of the finished triangle should measure 9 3/4" or very close to it.