I ordered a sample pack and a fat quarters set(of 4) and had plenty to make two 9 foot long banners. I have enough left over to make even more!
So here's my process! Click pictures to zoom in.
I made a triangle template out of simple paper, to about the shape I thought would look good. I used "wide single fold" red bias tape which was so easy to work with. It's already folded over and pressed down, so you just stick your cut out triangle shapes in between and sew. The process went pretty smoothly! I don't know why I haven't made more since then. I plan to.
I finally got to give the finished product to my mom in June when they came to visit again. So it was a late Mother's Day gift but she loved it! And here they are hung up in her house in Alabama in July. Two 9 ft long flag banners.