If you're in a thrifty mode, your best bet is these Frye Sandals. It's a fantastic piece, while not very costly. Another strong contender for your wardrobe is these Joie Sandals. While the price of this item is rather reasonable, it will certainly attract a lot of attention.
If you can afford to spend a little more, look no further than these Cole Haan Ballerina Shoes. This item doesn't cost too much, but absolutely deserves a spot in your wardrobe.
If you're looking at it like an investment piece, then you absolutely must check out these Rag & Bone Ankle Boots. This piece seems expensive, but it's worth it. While you're at it, also have a look at these Rag and Bone Booties. Yes, this item is expensive, but it does not mean it's not worth it.