I'm one of those weird people who actually uses the lines on the cutting mat for measuring purposes when cutting for a quilt - rather than the lines on the ruler. Therefore, I really like the Fiskars mats and the Gingher mats. Their inch lines are all the same width, unlike Olfa that has wider lines every 5 inches. I also find that the tiny dots on the quarter inch lines make it very easy to accurately line up my ruler for cutting.