I'm making a quilt from a pattern and the directions say "cut 5 inches by LOF" Length of fabric. Well my fabric may be 1 yard or 5 yards. I had to sit there and figure out the length of each section, multiply by the number of sections needed, add some inches for cutting error (which I never make LOL) and then cut it. I understand WOF; they may have to change that soon too since the widths seem to be getting narrower. I've never seen LOF before. Unless you purchased the fabric in the amounts listed, I think a newer quilter would have had trouble cutting this pattern out correctly. Keep your fingers crossed that I did!!