It's just a basic worked in the round, drawn-together top beanie. I embellished it with some embroidery in another brand of single-ply knitting yarn with a leaf, since the color scheme seemed autumnal to me.
Below you can see the drawn-together top:
I've been thinking a lot lately about hat sizing, and bonnet sizing. Usually, it's just head circumference and sometimes hat depth given, but how to determine hat depth was always a puzzler for me. I think I may have finally figured it out: measure from ear to ear (either below ear, or whatnot, depending on the intended fit) and then divide by 2, and consider ease. Bonnets are a bit trickier, I think, but I've been feeling bound and determined lately to figure out some standardized sizing chart for bonnet making.