I have never been much of a scarf girl but lately I've been wanting scarves and cowls and have purchased a couple and sewn a couple.
The plaid is done with a 1/2 yard of cut of flannel (from the remnant bin at JoAnn). I sewed the long end, turned it, and sewed the short end shut in a circle, leaving a small opening to turn the scarf. I then hand stitched the opening.
I also made a black one with 1/2 of a 1 yard length of cotton gauze. I sewed the long end (36"), turned it and sewed the short end. I wear it doubled most often.
I really love both and it's a great way to use small cuts of fabric!