1. Position and pin bias strips perpendicular to each other with right sides together and raw edges aligned.
2. Draw a diagonal line on top bias strip from top left to bottom right.
3. Sew on marked line to make a diagonal seam.
4. Trim seam allowance to 1/4". Press seam allowance open.
5. Fold and press edges toward center of bias strip.
6. Fold pressed strip in half; press to make one continuous folded bias strip.