1. Cut one piece of fabric 20" X WOF
2. Cut one piece of fabric 10" X WOF
3. With right sides together, sew a seam on both long sides.
4. Turn tube right side out and press.....there will be a band of fabric on each side of center fabric of 2 1/2".
5. Trim ends.....so they are even and sew 1/2 seam across each end ... press seams open.......and turn ends out......this forms a point at both ends.
Hope this helps.