Originally Posted by kathy
I don't understand why but the lines on the mat are not the same as on a ruler, I had to check it out for myself, lay your ruler on your mat, lining up the begening line, by the time you get to the other side of he ruler you can see the lines don't match up any more.
There can definitely be differences between rulers and mats; also between rulers and rulers, mats and mats. That's why it's important to be consistent in what you use to cut out a quilt. You wouldn't want to change from using the lines on a mat to using the lines on a ruler while in the middle of cutting out a quilt.