This is a modification of another pattern on Ravelry: https://www.ravelry.com/patterns/library/christmas-tree-hat--elfin-socks (for premies and newborns) by Patti Pierce Stone. I have scaled it up to fit an adult head.

10/31/08 - The pattern is still in DRAFT. Please knit this pattern and let me know if you see any errors and how much yarn you used, and what weight. I will update the pattern when I feel it is bulletproof.