Hat shown is a ladies small. Hat is knitted with worsted weight yarn usig US8 (5mm) size needles.

This hat matches the Asherton Scarf:
http://smariek.blogspot.com/2006/09/asherton-reversible-scarf.html
http://www.ravelry.com/projects/Smariek/asherton-reversible-scarf

Stitch patterns used in this pattern are mentioned in the Pattern Post here:
http://smariek.blogspot.com/2006/09/asherton-hat.html
and also in the Pattern Bibliography post here:
http://smariek.blogspot.com/2007/11/pattern-bibliography.html