The Omnigrid 1 x 12 ruler is used with compass points to draw circles (it has an extra ½Â to accommodate compass points); it's also used to add seam allowances when sewing and quilting.
Use with a rotary cutter or a straight-edge blade
The 1 x 12 ruler has the following standard Omnigrid features:
Edge markings for accurate measuring
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 use