Key limes are small, round citrus fruits known for their unique tart flavor. They are typically about the size of a golf ball and have a thin, yellow-green skin. Unlike regular limes, Key limes are more aromatic and have a higher acidity, making them a popular choice for desserts like Key lime pie. These limes are primarily grown in the Florida Keys, where the warm climate helps them thrive. They are often used in beverages and marinades, adding a refreshing zest to dishes. Their distinct taste and fragrance make Key limes a favorite among chefs and home cooks alike.