If you're not planning on spending much, this Rag & Bone Denim Shirt will fit the bill. It's a foolproof choice, while not very expensive. In this price range, you can also take a look at this Mother Denim Shirt. It's also a popular item and won't break the bank. You might also want to consider this Closed Denim Shirt. The price is very reasonable, but the effect on your wardrobe will be pretty fantastic.