Gosh, it almost looks to me like the scarf was done in 1 x 1 ribbing using two different weight yarns. one rib looks like it was done in super bulky and the next rib just in bulky. However, you can certainly make a short scarf using your bulky yarn and do a 1 x 1 ribbed pattern. Add a buttonhole about 5 or 6 inches from the end of one side of the scarf and voila! a nice neck warmer. however, the ribbed pattern would not be chunky and thin like the one in the picture.