The top tier of wealth in the world is a veritable boys’ club, with only four women breaking the top 50. But that doesn’t mean there aren’t plenty of women who have earned huge fortunes for themselves as well. With data from Wealth-X, a company that conducts research on the super wealthy, Business Insider has taken a look at the richest self-made women in the world. These women have built companies, pioneered new technologies, and made huge advances in their respective fields. They’re worth a combined $53.1 billion — larger than the combined gross domestic product of Honduras, Iceland, and Cambodia.