If you can’t spend much, your best bet is this Neiman Marcus Belt. It's a great product, while not very expensive. Another strong contender for your wardrobe is this C. Wonder Belt. While the price of this piece is rather reasonable, it will surely attract a lot of attention.
If you're willing to splurge, then what you're looking for is this Marc Jacobs Belt. It's more expensive but worth your money. Why not take a look at this Prada Belt too? Expensive, but worth every penny. It is also worth checking out this Miu Miu Belt. You won't regret the money spent!