Prymamericas.com: Sewing, quilting, and knitting supplies

Right Triangle Ruler

Right Triangle Ruler - Main image
$12.26 $16.79 In stock

Category: 203

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

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Customer Reviews (4.6 / 5 · 5 reviews)

Owen ★★★★★

The markings are crisp and easy to read, so I can cut quarter and half square triangles without second-guessing the math. It’s genuinely sped up my quilt block prep, and the built-in seam allowance numbers mean less fiddling with my rotary cutter.

Jacob ★★★★★

The printed seam allowance numbers sit right on the ruler, so I don't have to do any mental math when cutting half-square triangles. It's saved me at least ten minutes per block and the markings haven't worn off after a full weekend of use.

Avery H. ★★★★★

I love how the seam allowance calculations are printed right on the ruler, which saved me from measuring everything twice. It makes cutting half-square triangles for my quilt blocks so much faster and more accurate.