The Stripology XL, a Creative Grids Quilt Ruler designed by Gudrun Erla, combines all of the features you love in the original Stripology ruler AND the Stripology Squared. This beauty combines the height of the Stripology Squared so you can square up blocks up to 12-1/2 inch -- with the width of the original Stripology so you can cut up to eight 2-1/2 inch strips or 14 1-1/2 inch strips without ever moving the tool, reducing your rotary cutting time by up to 75 percent. The 2-1/2 inch increments are marked with squares; the 1-1/2 inch increments are marked with stars -- no math required! Need to cut in 1/4 inch increments? No problem, just follow the chart included in the instructions and use the 1/4 inch line on the ruler. There are 60 degree lines as well as 45 degree lines; 1/2 inch lines; and additional markings to aid in cutting perfect triangles every time. The ruler slides easily over the fabric until pressure is applied. Then, the exclusive gripper holds the fabric in place while cutting, eliminating slipping and miss-cuts! This ruler comes with fully illustrated step by step instructions.