If you can’t spend much, your best bet is this Eugenia Kim Hat. It's a wonderful item, while not very pricey. Another nice option is this Marc Jacobs Beanie. It's an item you're bound to love which also doesn't cost the earth. You may also want to look at this A.P.C. Knitted Hat. This item is not expensive either, but it will make a difference in your wardrobe.