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Right Triangle Ruler

Right Triangle Ruler - Main image
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$10.41 $16.79 In stock

The Omnigrid square triangle ruler is used to create quarter and half square triangles for finished quilt blocks; it has seam allowance calculations included in the measurements.

  • Used to cut half-square and quarter-square triangles; seam allowances are included in the measurements, which are based on the finished size of the quilt block
  • Use with a rotary cutter or a straight-edge blade
  • Edge markings for accurate measuring and laser cut edges for smooth, deep cutting
  • Patented double-sight lines that show up on light and dark fabrics
  • Heavy-duty durable acrylic material
  • Left- and right-hand numbering and angle system
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Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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Returning an item

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (5.0 / 5 · 5 reviews)

Ryan ★★★★★

This little ruler saves me so much math when piecing triangles. The seam allowance markings are right there on the lines, making half-square and quarter-square cuts quick and accurate.

Riley ★★★★★

Finally, a ruler that accounts for seam allowances so I don't have to do the math myself—it saves so much time cutting half-square triangles. The markings are crisp and easy to read, even under my sewing machine light.

Claire P. ★★★★★

The seam allowance lines are printed clearly and make cutting half-square triangles so much faster. I appreciate not having to do the calculations myself—it really helps me avoid mistakes in my quilt blocks.