I bought 1 skein of Plymouth baby alpaca brush paint from the new yarn store to work up in a scarf. I liked the feel and the colors of this yarn. I used my largest needle, 9.0 mm, and cast on 19 sts. (a multiple of 4 + 3) and did mistake rib pattern until the yarn ran out. Mistake rib is k2p2 until last three st. then k2 p1. Repeat every row.
It took less than a week for me to finish. I was working on other projects during that time as well.