A simple 18 or 20 stitch-per-row scarf in K1P1 rib, with the first stitch on each row passed purlwise with yarn in front. (Sorry to guess about the stitch count, but I gave it to Ashley without counting it and verifying.)
I used a US size-8 circular and 2 77-yard (50g) skeins of Bernat Havenyarn. The color looks like an iced orange, but Bernat called it Cinnamon Mist. Haven is a blend: 59% acrylic, 22% cotton, 16% alpaca and 3% nylon. The yarn is bulky and the label recommends size-10 needles, but I’m a loose knitter and generally have to go down 2 needle sizes to get gauge. Now, on this project, I didn’t measure my gauge, ’cause it’s a scarf and who cares, but the fabric looked good when I used the size-8 needle, so I didn’t try anything larger.
The final measurements are approx 66 inches long and 5 inches wide (but it’s rib, so it stretches wider with no problem).
I used all but about a foot of the yarn, between the two ends of the scarf.
Total knitting time, about 7 hours, spread out over 3 days.