The pattern is really great and detailed and even includes cutting instructions for a feature panel. Yay for no math!
I made the 8 inch size with the two handle option. I did end up just using Thermolam for the exterior lining and a lightweight interfacing for the interior. Because they weren't as stand-up-able as they might have otherwise been, I added a little pintuck thing (is that what those are called?) in each corner to help it stand up straight.
So far my kids think that these make really awesome hats, but pretty soon they will be happily filling them with candy!