So easy peasy. I have knit a wholattamany of these scarves. I've done one in every one of my colorways and it seems I always have one going. They are so popular and it is my favorite scarf on those cold winter days because you can wrap it around and around your neck or around your head and your neck and look quite lovely at the same time.
Here's what you do:
With size 15 needles, CO 20 stitches and knit every row. That's it!