If you are on a limited budget, your best bet is this Opening Ceremony Knitted Hat. It's a great product, while not very expensive. You can also look at this Plush Beanie. It's an item you'll love which also doesn't cost the earth. You may also want to look at this Beanie. This item is not expensive either, but it will make a difference in your wardrobe.
If you're looking for a bargain, look no further than this White + Warren Beanie. This item doesn't cost too much, but definitely deserves a place in your wardrobe. It's also worth considering this Knitted Hat. This product is ultra popular and, just as importantly, not very expensive. Consider this Jocelyn Beanie too! Great value for your money.