I have a ovarian cyst that is 6cm, how large is that fruit wise, and does it need to come out?

Ovarian cysts: 6cm is about the size of a large lime. Whether an ovarian cyst needs to come out does not only depend on the size, however. It also depends on whether you have symptoms from the cyst, as well as what the cyst looks like - whether it is complex or simple, whether it has any concerning features, etc. There are many different kinds of ovarian cysts. You should talk to your gynecologist.