Finished measurement: about 5.25” wide x 72” long (but you can make it longer if you like)
Berroco® Comfort worsted weight (3.5 oz / 100 g; 210 yd / 193 m): 2 balls of main color (MC), 1 ball of contrast color (CC)
NOTE: There will be enough left over to make a hat, so if you plan to do two scarves I’d go with just 3 balls of the main color and perhaps only 1 ball of the contrast color. I made one scarf for a nephew at University of Iowa (gold and black) and a scarf for a nephew at Iowa State University (red and gold), so I bought 2 balls of gold, 2 balls of red, and one ball of black. There was only red and black yarn leftover.
US 7 needles (straight or circular, whichever you prefer)
Gauge is about 20 sts and 24 rows to 4” square in stockinette stitch. It’s not terribly important because when you knit in 1 x 1 rib it ends up looking like flat stockinette stitch except that it won’t curl. In 1 x 1 rib, I get 30 sts (counting each knit stitch as 2) and 24 rows to 4” square.
START KNITTING HERE:
Cast on 40 sts with CC. Work 36 rows of 1 x 1 rib (K1, P1).
Change to MC. Work 2 rows of 1x1 rib in MC and 2 rows of 1x1 rib in CC until you have 18 bands of each color (72 more rows).
Next, work 1 x 1 rib in the MC only. When the whole scarf (laid flat and no stretching) measures 36 inches long (or whatever is half of the length you plan to knit it), mark that row as the halfway point, then keep working 1 x 1 rib in the MC until you can fold the scarf at the halfway point and it meets the stripe section.
Repeat the stripe section: Change to CC. Work 2 rows of 1x1 rib in CC and 2 rows of 1x1 rib in MC until you have 18 bands of each color (72 more rows).
Finish with 36 rows of 1 x 1 rib in the CC.
(PS - Thank you to Mark N. at my office who kindly modeled this scarf for me. He has a nice neck for modeling scarves.)
Bind off (helps to do it in pattern) and work in the ends.