Making a bonnet pattern can seem daunting, but it's actually fairly simple. There are many ways it can be done. For this guide I used sticky tape, scissors and A3 cartridge paper.
My daughter needed a Regency bonnet. I found this simple design on google. I will link to the original source when I have a little more time.
I started by making a tube the same measurement as my daughter's head. Then twisted it to make it slightly conical and sticky tapes it into place.
Next I cut into the paper to create an opening the size of the back of my daughter's neck. Paper can also be added to make it rounder and remove the "V" from twisting the paper. To make the shape stable enough to start forming the brim I made the crown pattern. There are two types of crowns.
1. Flat with a sharp edge
2. Circular and rounded.
This bonnet has the second type. They are both formed similarly. Trace around the inside of the back of the cone shape onto another piece of paper. For the flat you cut out the shape traced and sticky tape it on as is.