Probably the most popular size of diamond stud earrings is one carat TCW. This size is sufficiently big to be visible and matches a popular budget individuals have for diamond earrings. My favored pair of one cttw studs are these stunners inside a white gold martini setting from Blue Nile. https://flenzy.store/316l-stainless-steel-heart-tree-of-life-stud-earrings/