How to make an origami hat - origami snapback (Henry Phạm)
How to make an origami sun hat (http://www.origami-make.org/origami-hat-sun.php)
How I Became a Pirate
Origami Crown- Easy Paper Craft For Kids. Simple Japanese paper folding, suitable for kindergartners or early elementary. Great for fine motor development!
Newspaper hats, or boats.
Pirate Hat Guide, from wikiHow
ORIGAMI ARTIST AND FREELANCE INSTRUCTOR IN SINGAPORE: ORIGAMI FASHION HATS A TRENDY SELECTION INDEED !!!!!!! HATS FASHION WEEK ON ORIGAMILOVE -DAY 1
Origami Party Hat. use different sized paper to get different sized hats. You will also want to use a little glue to hold things together.
origami+images+with+instructions | Origami Instruction: A Samurai Hat
How to make an origami witch's hat: page 1