This same story is given with more than Talmudic exaggeration in the Targum of Jonathan ben Uzziel, while the author of the Book of Jasher (chap, lxv., verses 23, 24) makes the camp and the mountain forty miles in extent. The giant here figures in antediluvian tradition. He is said to have been saved at the Flood by laying hold of the ark, and being fed day by day through a hole in the side of the ark by Noah himself. A tradition which says the soles of his feet were forty miles long at once explains all the extraordinary feats ascribed to him.
The Giant Og Who Held the Ark and Survived the Flood
Hebraic Literature (Harris, 1901), Talmudic Miscellany