I got the regular 3mm foamies from Michales, who also sells them in a large roll. But you could probably use duct tape to tape together a few smaller pieces if you cannot find the large rolls. And less than a yard of fabric, I did not actually measure since I made it from scraps from a dress that I Submit Commentmade.

Cool, I would love to see what you come up with!

Yes, I was able to give a curl to my black mage Yuna's hat by altering the simple form some. Instead of cutting a single cone out of foamies, I cut a 3 different cones of different sizes and stacked them on top of each other. I made sure to glue them all together and then covered them in fabric just like in the tutorial. You just need to get creative with the shapes you choose, but you can still think in basics. Use the tutorial as a starting point.

Good luck!