Originally Posted by CorgiNole
I don't use them to measure by, but will sometimes use them to help make sure my fabric is lined up squarely.
Cheers, K
This is what I do too. I always use my ruler to measure unless the cut needs to be bigger then my longest ruler. Then I use my mat up to 36". I use my mat to square up but use a tape measure to measure out the cut if it is longer then 36" and I measure at least 3 times before making the cut.