cabled vest/cowl - *Inspiration* this one is knit but you could easily crochet this so pull out your favorite scarf pattern and get to crocheting. You may need to adjust the width of the scarf. Once your scarf is long enough, wrap it around yourse.
How to Loom Knit a Cabled Scarf with a rectangular loom. DIY Tutorial by Tuteate. This step-by-step tutorial shows you how to knit a cabled scarf with a rectangular loom and wear it as a cowl by sewing 2 buttons to it.