There is a foot print in South Africa (If memory serves) which had to have been made by a being at least thirty feet tall if appendages are proportional. The stone with the print is showing the printvertical to the surface of the planet. If genuine it has been tossed around by earthquakes and or flood.
Yet destroyed I the Amorite before them, whose height was like the height of the cedars, and he was strong as the oaks; yet I destroyed his fruit from above, and his roots from beneath.
The height of the cedars? Wow, there must have been some tall dudes out there. My feeling is, some Nephilim were taller than others.