Sew Easy: Trimming Oversized Triangle-Squares

Sew Easy: Trimming Oversized Triangle Squares

Try this method to make perfect triangle-squares every time. Below you’ll find both video and image+text tutorials for this technique with clear, step-by-step instructions. PLUS—if you’ve found this lesson useful, you can download a copy of this AND many more Sew Easy lessons in our FREE eBooklet Sew Easy Lessons: The Essential Collection of Quilting Techniques. Click here to download your copy of this lesson plus many other tried-and-true patchwork tutorials!

Video Tutorial

Step-by-Step Sew Easy Instructions

  1. Using squares that are 1″ to 1-1/8″ larger than desired finished size of triangle-square, align 45-degree line of ruler along diagonal seam of triangle-square, allowing top and right edges to extend slightly past the edges of ruler.
  2. Trim along top and right edge of ruler.
  3. Turn triangle-square. Align ruler’s 45-degree line with seam, and unit’s cut edges with desired measurements. Trim top and right sides to square up unit.

Products used: Havel’s Self-Healing Cutting Mat, Havel’s 45mm Rotary Cutter, and Havel’s 6-1/2” Fabric Ruler. Check out Havel’s Sewing for more information and a complete catalog.

Machine featured is the performance icon™ by PFAFF®. To find a retailer near you, visit

Fabric from Garden Glory collection by Maja Ronnback and Abstract Collage collection by Ampersand, both for Paintbrush Studio Fabrics.

If you’d like to download the individual PDF of Sew Easy: Trimming Oversized Triangle-Squares, click here!

Want to learn more? Visit our Sew Easy index to find many more great Sew Easy videos from the Quilting Company team.

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