If you're not planning on spending much, your best bet is this Headband. It's a terrific product, while not very pricey. You might also be interested in this Eugenia Kim Headband. It's a product you'll love which also doesn't cost the earth. You might also want to consider this Kate Spade Headband. The price is very reasonable, but the effect on your wardrobe will be pretty fantastic.
If you want to splurge on a luxury piece, then you won't be disappointed if you check out this Ermanno Scervino Headband. It's an expensive but smart option. Another product we're drooling over is this Jenny Packham Headband. It's costly but you get what you pay for. In this price range, you can also look at this Headband. You won't regret the money spent!