I found this pattern on Hopeful Honey, a wonderful blog about crochet. She gave some great tips too about hook sizes and how to work it and I had no problem following her pattern and the tips were quite helpful. Sadly I can't remember what hook size I used, but I do know the suggestions helped me out. The cowl is quite pretty, and I've worn it to work and with jeans.
The pattern is open weave, though with the chunky yarn I chose, you can't really tell. But the sparkly thread really makes this cowl I think. Using a more basic yarn would yield a different look entirely, so play around and see what works for you.