This are instructions to make the Mad Hatter Hat from the new Tim Burton's Alice in Wonderland
Step 1: Cardboard box
The size of the cardboard will be the measurement of your head, remember to add half to one extra inch of size so that it can fit over the wig.
How tall you want it is up to you, I made it the size of my head and a half, after this cut strips about an inch or 2 apart. DO NOT go all the way through the cardboard except on the bottom and top tabs that will be used to glue the top and the visor.
Step 2: Make cylinder
Fold it and tape from the inside so that you end up with a cylinder, you will get a good idea of how tall it will be from here, just remember you will loose about 2-3 inches when you expand it.
Step 3: Make expansion
Once you have it taped cut through the strips to a little more than half way down the hat, then bend each strip outwards so that you end up with something like this.
Step 4: Top part and visor
Cut a large circle, this circle will give your hat its size on the top, to measure according. Cut 2 of this circles, one will serve of that expansion the other as the main cover. Then using the cylinder trace the circle to be cut out of the visor part, draw another circle the same size as the top circles and draw the sides so that it has an oval shape you should end up with this.
NOTE: Use the circle and trace the pattern on the cloth that will be used to cover the hat, do the same with the visor, but trace it twice, one for the top part and one for the bottom. You should do this now because it will be very hard to do this once the hat is assembled.
Step 5: Glue Visor
To put it together insert the hat into the visor and then just fold the tabs and glue on the bottom using hot glue sticks.