Gauge is unimportant. You can use any needle and yarn that you are comfortable with, and you can make it any size you wish. With the yarn and needles listed, this comes out to be a medium size shawl that extends from wrist to wrist at the top.

For some visual aids for dividing each new section, see this blog post.

Many thanks to laetidunord, who has graciously translated this pattern into French!
Click here for the French translation