ANY HAT CAN BE MADE OF ANY MATERIAL AND ANY SIZE. I USE THE CIRCUMFERENCE OF YOUR HEAD SIZE. LEATHER CAPS ARE MORE AND DEPENDS ON THE LEATHER PIECE. THEY RUN ABOUT $50.00 on up.
Patterns used: You Sew Girl: http://www.nicolemdesign.com.au/shop/
Tony Allen Bernier found on Etsy.
Cap Supply Company: https://capsupplyco.com/
All flat caps can be made to fit your head. I need to know the circumference of your head. I have a lot of fabrics to choose from and will be happy to send you pictures of fabric. Email me.