half-square triangles

How to Trim Half-Square Triangles Perfectly

When I first started quilting nearly 20 years ago, the method for making half-square triangles was pretty straightforward and limiting. Cut your squares 7/8-inch larger than the finished block, stack them together, sew a 1/4-inch seam on both sides of a center line, cut them apart, and press. You were supposed to have the right sized blocks following these steps.

Except I never did. Ever. It was so frustrating.

And while a number of novel ways to create half-square triangles have come along and the rulers – oh, the rulers! – make creating them clever, my favorite way to make half-square triangles is to make them bigger than I need to and them trim them down after they’re sewn.

half-square triangle quilt block

A perfectly pieced and sized half-square triangle!

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