Pattern For Brim
Cut from a piece of manila paper fourteen and one-half by fourteen and
one-half inches the largest possible circle; the paper may be folded
into halves, then quarters, then into eighths and creased.
A round brim will not be of equal width all around from headsize wire,
because the headsize wire must be oval to fit the head. The front and
back will both be about an inch narrower than the sides.