I don’t remember what hook I used. I used Hobby Lobby I Love This Cotton for the hat and acrylic worsted yarn for the flower. Hat pattern here:
http://allicrafts.blogspot.com/2012/12/free-pattern-open-...
Flower pattern here: http://allicrafts.blogspot.com/2012/08/free-pattern-no-se...

Thanks to Alli Hyer for the free patterns. Well written and quick and easy to make. :)