I knitted this one from Manos del Uruguay pure wool, handspun by a women's collective then kettle dyed. I over-dyed the yarn myself to reduce the yellow and intensify the greens - and I am very pleased with the result. It is a unique, modern hat suitable for a man or a woman.
This one was knitted in the round - so no back seam. It measures 8.5 inches crown to brim and approx. 21 inches around its stretchy brim.