Giants Before the Flood

There were giants in the earth in those days [before the flood]... the same became mighty men which were of old, men of renown. Genesis 6:4

For only Og king of Bashan remained of the remnant of giants [after the flood]; behold his bedstead was a bedstead of iron; ... nine cubits [13.5 feet] was the length thereof, and four cubits [6 feet] the breadth of it, after the cubit of a man. Deut 3:11