When I made this pattern, I was looking for a wind proof hat, warm and comfortable. I worked only with natural fibers; cashmere, silk, alpaca. I have worked a crown that is not flat but that has a nice curve to it, making it the perfect fit. This hat is well formed and will not change.
It looks much more complicated than it is in reality.
I offer help if you need it.
For the sizes available I included a chart to all different sizes, that You can adjust as you go.