I was cutting fat quarters for Christmas table runners using this pattern
http://www.quiltbug.com/free/table-topper.htm
Instead of cutting the center square 9 1/2 inches I cut it 9 inches. Do you think I need to cut everything else 1/2 inch shorter/narrower too? Luckily I was only cutting fabric for one instead of mass cutting for the 20 I am planning on making.