This is a seamless winter hat knitted from the bottom up. 
The brim is wide and thick with a folded ribbing.
A simple stranded colour work is featured on the upper part of the brim, following the chart. 
Since it is a stretchy brim, you can adjust the size other than the size give in the pattern by using the needle between 4.0 mm (US6) and 4.5 mm (US7).
There are 3 different colour work charts in the pattern.
YARN 
DK weight or Fingering & Mohair held together : 
about 115 (150, 190) meters
GAUGE 
23 stitches X 26 rows (10 x 10 cm) in Stockinette stitch using 4.5 mm (US7) 
21 stitches X 27 rows (10 x 10 cm ) in 1 x 1 Rib stitch using 4.5 mm (US7)
SIZE DIRECTION 
1 (2, 3) 
Generally, they could be for Teen, Woman, Woman large sizes.
NOTIONS 
5 markers, a tapestry needle