Great, someone has outlined here all maths necessary to design your own hat :)
Links:
Knitting Hats (How To: Knitting Pattern Tutorial for Hats with Math for Dummies (and everyone else too))
…compilation of tutorials
Great, someone has outlined here all maths necessary to design your own hat :)
Links:
Knitting Hats (How To: Knitting Pattern Tutorial for Hats with Math for Dummies (and everyone else too))