Originally Posted by
paulswalia
piece your lengths together first, either on diagonal or straight seam, THEN measure the length of the strip to match the length of the quilt.
This is how I do it. If the border is longer than the width of fabric, I cut two strips, piece them diagonally, and THEN measure the proper length... works every time!! And then you have a little leeway on where to put the seam, toward the corner or toward the center...