Lay the first
border down so that it overlaps the second border, and match
the pattern on the folded edge. Don't pin yet.
Fold the first
strip over to expose the folded seam allowance. The two strips
are now right sides together. Carefully match the print on the
seam allowance with the print on the second strip, which is right
side up. Pin just to the right of the seam allowance, keeping
the allowance free.
Unfold the seam
allowance and stitch on the pressed seamline. After checking
the pattern match, trim the extra fabric from the second strip
and press the seam.
Here's the finished
pieced border strip. The seam is our little secret!