Went to Lowe's today and found a 6 foot aluminum ruler for $11. I usually square up the corners of my quilts, then connect the squared sections. My 3' ruler isn't long enough Sometimes I use my husband's 4' drywall ruler, but it has the thing on the end to keep it square. This will be perfect. Don't think I will use it to cut, just mark.
OOh, I can also use it to mark long borders!