CM DESIGNSAddAQuarter Ruler combines the speed of rotary cutting quilt pieces with the accuracy of using templates. Automatically add a seam allowance to any straight angle and provide a straight edge for your rotary cutter. Made of recycled plastic. Cuts multiple layers. Has 1/4 seam allowance and is marked in 1/8 increments along the length. Length: 18. Made in USA.