There is a woman in Japan who makes kits for cat millinery.
I especially like her chick hat for cats, but it might be accidently thought of as being a duck hat. Being a graduate of Oregon State University (Go Beavers!) I feel it would be pointless to show anything that might be construed as promoting the University of Oregon ducks (GO BEAVERS!)
But if you really want to see the rest of the collection, including a bunny hat, leopard, Ann of Green Gables, and that chick/duck hat (GO BEAVERS!) just click here and scroll down a bit when you get there.
Just be sure YOUR cat isn't in the room when you do this...you wouldn't want to spoil the surprise of what Fluffy's getting for Christmas!