Hat shown is knit in the round with worsted weight yarn and US8 (5mm) needles.

Pseudo-Pattern can be found here:
http://smariek.blogspot.com/2007/03/passerby-mk-hat-3.html

Stitch patterns used in this pattern are mentioned in the Pattern Post here:
http://smariek.blogspot.com/2007/03/passerby-mk-hat-3.html
and also in the Pattern Bibliography post here:
http://smariek.blogspot.com/2007/11/pattern-bibliography.html
.