Description from site:

If you increase fairly rapidly starting here… end the shoulder cape at the point of your shoulder, and finish the top edge with a few rows of ribbing, you’ll have a splashy little circular shoulder scarf and neckwarmer.

If you increase more slowly … end the shoulder cape about halfway between your shoulder and elbow, and add a substantial five or six inches at the top end of the tube, you’ll have a considerably warmer garment that’s much like the one Abi’s wearing. Its topmost section can double as a hat. Just pull the infundibulum over your head until the top ribbing stretches from the point of your chin to the crown of your head, and hey presto, you’ll look like a marginal illustration from the Luttrell Psalter.

(Naturally, this also means that if you take that same infundibulum, roll up the tube starting at the top, stick your head through the doughnut thus formed, and flip the shoulder cape over to one side, you’ll look like Vogue Knitting Meets the Très Riches Heures du Duc du Berry. Alas, it’s not a joke that many people will get.)

If you continue slowly increasing until the shoulder cape reaches your elbow, then add on to the top of the tube until you double its length, you’ll have a very warm garment indeed, which, if worn over a long plain dress or skirt, has the power to make you look like a Byzantine illustration. All you need by way of accessories are a saintly attribute and a sign saying HAGIA YOURNAMEHERE.