The Creative Grids 90° Quarter-Square Triangle Ruler is a specialty acrylic tool designed for cutting and trimming quarter-square triangles with precision. It features a 90° angle layout with markings for ¼" seam allowances, diagonal guides, and size indicators for blocks up to 12" finished.

This ruler eliminates the need for complex math or guesswork when constructing quarter-square triangle units. It includes Creative Grids’ exclusive non-slip grip and high-contrast black and white markings for visibility on both light and dark fabrics.

What does this ruler help with?

It’s designed for cutting and trimming quarter-square triangles with accurate seam allowances and alignment.

What block sizes does it support?

It supports quarter-square triangle units for blocks up to 12" finished.

Is it beginner-friendly?

Yes. It simplifies triangle construction and improves accuracy for piecing and trimming.

Does it have non-slip features?

Yes. It includes Creative Grids’ exclusive grip technology for safe rotary cutting.

Are the markings easy to read?

Absolutely. It features black and white printed lines for high visibility on any fabric.

Can I use it with rotary cutters?

Yes. It’s compatible with rotary cutters and standard cutting mats.