Having worked on only small pieces thus far, this is my first time cutting a large length of fabric; I need two - 68 x 3 ½ inches long for the border of a table runner, plus the accompanying backing. I’ve a three-yard length of fabric and want to cut it parallel to the selvage, but how do I accurately cut a piece this large? The thought of quickly messing up this much fabric with my rotary is giving me the willies. Can anyone guide me in this
process?