In Numbers 13:32-33 is a report from the Israelite spies who scouted the promised land, who reported the great height of those who dwell in the land:
So they brought to the people of Israel a bad report of the land that they had spied out, saying, The land, through which we have gone to spy it out, is a land that devours its inhabitants, and all the people that we saw in it are of great height. And there we saw the Nephilim (the sons of Anak, who come from the Nephilim), and we seemed to ourselves like grasshoppers, and so we seemed to them.
In Amos 2:9-10, God adds his part concerning the height of the people who were in that land, saying they were as high as the cedars, which range between 18m to 35m (59 to 115 feet):
Yet it was I who destroyed the Amorite before them, whose height was like the height of the cedars and who was as strong as the oaks; I destroyed his fruit above and his roots beneath. Also it was I who brought you up out of the land of Egypt and led you forty years in the wilderness, to possess the land of the Amorite.
So, was God exaggerating or was the promised land filled with people of that height?