I used this pattern with probably about 6 or 7 ply wool (I can't remember) and a 5 mm hook. I started at about 8pm and finished at 3.30am. The reason I love crochet so much is that it grows fast. Oh and it's not actually black, it's brown. I'm going to do another one in blue, or go to my local op shops today and look for some more wool! YAY.