Modern Fundamentals: Quarter-Square Triangle Blocks

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In each issue of the MQG Journal this year, Yvonne Fuchs will teach us Modern Fundamentals of quilting. In this issue of the MQG Journal, we will explore how to make Quarter Square Triangle Blocks, widely known as Hourglass blocks, which are square blocks that are made up of four 90° triangles. 

Before making a quarter-square triangle block, it is helpful to be familiar with making half-square triangles (HST). For a guide on half-square triangles, see MQG Fundamentals: Half-Square Triangles.

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Yvonne is a former aerospace engineer turned modern quilter, designer, and technical editor. She was introduced to quilting by her paternal grandmother in high school when her grandmother offered to hand quilt a twin-size quilt to use in her college dorm room if Yvonne made the quilt top. Now, 25 years later, Yvonne has developed a style that bridges her technical background and love of bold color, specializing in transparency color play and bold, geometric designs. Yvonne’s quilts have been featured in numerous national and international magazines, quilt shows, and Modern Quilts: Designs of the New Century. She lives on the big island of Hawaii with her husband.

You can follow her creative journey on her blog,, or on Instagram @quiltingjetgirl.