This is a pattern I created a few months ago and I've made quite a few for people who've requested them. It's quite versatile for changing sizes. Although I have specified a particular brand, there is obviously no reason why a different yarn cannot be substituted, but James C Brett seems to drape really well for this project.
http://www.crochetville.com/community/files/file/503-ribbed-scoodie/
Edited just to say - if you see the name "Zoe Deterding" on the pictures or document, that is me (my username on Crochetville is different).