There is no definitive answer to this question as it depends on personal preference. Some people may prefer a small nose stud while others might opt for a larger one. It also depends on the size and shape of your nose - a smaller stud may look better on a narrower nose, for example. Ultimately, it is up to you to decide what size nose stud looks best on you. If you're unsure, it might be worth trying out different sizes and styles until you find something that suits you.