If you are getting accurate cuts it doesn't matter. I used to use the lines on my mat and found I was getting off cuts so I only use my ruler now and it is much better for accuracy. Being a mile high I have to be careful 'cause the air is thin and the fabric wants to float above the cutting mat. You believe that, right?
Last edited by BettyGee; 02-03-2014 at 08:03 AM.
Reason: Added text