If you are on a tight budget, your best bet is this Theory Blouse. It's a fantastic item, while not very pricey. Another strong contender for your wardrobe is this Theory Vest. While the price of this item is rather reasonable, it will definitely attract a lot of attention.
If you can afford to spend a little more, you're in luck with this Theory Off Shoulder Top in stock and waiting for you. You most certainly will love this piece. You might also want to check out this Theory Blouse. It's an attractive option both price and quality-wise.
If you're looking to purchase a designer item, why not take a look at this Theory Jacket - a great luxury choice. While you're at it, also have a look at this Theory Tank. Yes, this item is expensive, but it does not mean it's not worth it.