Key limes are a small, round variety of lime, typically measuring about one to two inches in diameter. They are known for their distinctive yellow-green color and a tart, aromatic flavor that is more intense than that of the common Persian lime. Key limes are primarily grown in the Florida Keys and are often used in desserts, particularly in the famous Key lime pie. These limes thrive in warm, tropical climates and are usually harvested when they are still green. Key limes are rich in vitamin C and are often used in beverages, marinades, and dressings. Their unique flavor profile makes them a popular choice for both sweet and savory dishes.