The most common diamond stud carat weight for men’s diamond earrings are between 0.25 and 1 carat, but if you're looking for something eye-catching, then a larger diamond stud will make a wow look. Keep in mind, that in a pair of diamond earrings, the carat weight listed will refer to the total carat weight of both earrings combined. We’d recommend a single stud that’s 1.25 carats or heavier.