I agree with "MIS" completely! I never thought about stretch in my sashings. I am doing sashing right now for a BOM and I'm cutting WOF. Then with the borders, I'm cutting WOF also. I will just sew the pieces together. I have done LOF for borders when it's called for, but only then. I love mitered borders!!!!!! They are so beautiful to look at. I don't do them enough.