Use the straight side of this triple strip ruler to cut 1.5", 2.5", and 3.5" strips (or browse our wide selection of pre-cuts)! Sew these strips together to create a 6.5" wide strip set. Then, rotate the ruler to cut 120 degree triangles that finish to a height of 6". Continue to rotate the ruler 180 degrees to cut additional triangles without wasting fabric. A 1/4" dashed line is also printed on each side of the center vertical line, so you can cut 60 degree triangles that include the seam allowance - thus eliminating Y-seams!