The Omnigrid 8” quarter square triangle ruler is used to create quarter-square triangles for finished quilt blocks up to 8”; it has seam allowance calculations included in the measurements. In general, Omnigrid triangle rulers are 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.
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The Omnigrid® 8 inch half square triangle ruler is used to create half-square triangles for finished quilt blocks up to 8; it has seam allowance
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