Regardless of whether the Anakim were actually related to the Nephilim, it is obvious that the Israelites were dealing with giants. If our understanding is correct that a cubit was approximately 18 inches, then Goliath, at "six cubits and a span," was somewhat over 9 feet tall. Og, the King of Bashan whose bed is described in Deut. 3:11 as being about 14 feet long by 6 feet wide, was thought to be 10 to 12 feet tall. As difficult as it may be for us to imagine such huge people today -- Shaquille O'Neal is a mere stripling compared to them! -- the clear impression one receives from these reports is that they record factual information, not mere legend. If we consider for a moment that from dogs we can breed not only toy poodles but also mastiffs, we ought to keep an open mind to the size possibilities incorporated by the Creator into the genes of the earliest humans.
Today's nuttiness is brought to you by the good folks of Bible Archaeology.