With US 17 needles and 2 skeins of worsted weight yarn, at least 250 yards each.

My sample shown is 9 inches wide by 76 inches long. I am a loose knitter, so your gauge may be tighter depending on how you tight you knit. You want the scarf to have body, the reasoning for the large needles.

If you use DK weight, drop needle size down to US 11.

Just remember with this pattern, K3 to start the row, and K3 to end the row.