I'm confused about how to cut and sew a continuous bias strip from one piece of fabric.
To make continuous bias, start with a rectangle of fabric. Tear or pull threads to ensure all edges are on grain. Using a ruler with a true 45° line, mark a bias line beginning at one fabric corner.
Determine the desired bias strip width. On the fabric wrong side, mark bias lines parallel to the first line and the desired width apart. Mark a 1/4" stitching line at the rectangle top and bottom.
Mark points A and B as illustrated. Trim off the ends along the first and last bias line (Figure 1).
With right sides together, match points A and B, and pin. Pin the remaining edges together, matching each set of bias lines at the stitching lines. The tube will appear somewhat twisted (Figure 2).
Match points A and B. Match bias lines along stitching lines.
Stitch along the marked stitching line with 20 stitches per inch. Press the seam open.
To form one strip of continuous bias, cut along the marked lines beginning at point AB and continuing around the tube (Figure 3).
Cut along marked lines.