What is the perfect size of diamond stud earrings?

There's no definitive answer to this question, as the perfect size for diamond stud earrings will vary depending on your personal preferences and style. However, a good rule of thumb is to choose earrings that are approximately 1/3 to 1/2 carats each. This way, they'll be large enough to make a statement but won't overwhelm your face. Ultimately, it's up to you to decide what looks best on you! Try on a few different pairs of earrings in different sizes to see what you like best.