Same pattern as the purple knit felt hat below. Different yarn - this time: Paton Classic Merino Wool
Colors: leaf green and royal purple, knit with two strands | Size 11 needle | About 6 hours to knit | Garter flat brim

Before Felting – Left | After Felting – Right

I also crocheted a chain of purple wool and felted it at the same time. Then, while drying, I wrapped the crocheted chain around the knitted band -- and let it dry in place. The hat fits great with the little bit of snug with the crocheted chain. Paton's yarn felts really well. A double strand of the worsted weight makes for a great winter-weight hat.

Post Knitting Note
This was a little too lime-green for me, and I ended up spending about $10 USD in dye to overdye with a blue to make the hat more teal than spring green. A lot of trouble and cost. Moral: knit the colors you like. REALLY like.