A lime is a citrus fruit, which is typically round, green in color, 3–6 centimetres in diameter, and contains acidic juice vesicles. There are several species of citrus trees whose fruits are called limes, including the Key lime, Persian lime, kaffir lime, and desert lime.

Shelf Life of LimesFresh about 2 weeks, whole limes will keep on the countertop for a week and up to about 2 weeks in the pantry. If you decide to refrigerate them, the fruits should last about a month in good shape, and maybe even a few weeks more if you go all in and keep them in a sealed bag