Winter Garden Hat by Mary Keenan (Ravelry)
This pattern can be found here:
Notes: The pattern is great but the finished piece was not 'deep' enough for my head so I added an extra panel to the depth (I started with rows 11-21, then knitted rows 1-21, before crown shaping). Perfect size! I have a small-med women's head - the middle size (81 stitches) is perfect for me.
With these changes the pattern uses 99% of one ball of wool - phew!