None. Never have been any found, despite claims. Fossils of extinct animals have been misinterpreted as giants or other critters. The Cyclops myth arose due to mammoth remains and lack of experience with living relatives such as elephants.
https://freerepublic.com/tag/adriennemayor/index
but the bible is so explicit about there being big men like goliath or Og or Anak they they must have existed. Its unlikely that they were mythical. I did some research on this. My guess is that they are the steppe herders from today’s ukraine called the yamnaya people. They pushed as far south as Israel/Jordan/Syria but their numbers were few. (They did not push into Egypt or Saudi Arabia) People in that region do have some yamnaya markers but those markers are few—but that corresponds to the bible recounting of them as being few. The records of them showed that they were head and shoulders bigger than everyone else in the way westerners are usually head and shoulders bigger than vietnamese. They first tamed the horse and invented the chariot. They first mastered copper. They expanded not by horsemen in the thousands thundering across eurasia. But only in small groups of men who would enter a village, kill all the men and then take the women as wives. This was a slow process that took 1000 years to complete. But it dates to the same timeline as the time line in the bible for the encounters with these people.