Robert Wadlow, the tallest man known to have lived (2.72 metres or 8 feet 11 inches) with his father, Harold Wadlow (1.82 metres or 6 feet 0 inches) – Wikipedia – Fair Use

Grapes of Eshkol
The grapes of Eshkol were so large that one cluster required a pole to be used to carry it.  This may be a clue to genetically engineered/modified food that the giants of old were eating.  Here is what the bible passages says:

When they reached the Valley of Eshkol, they cut off a branch bearing a single cluster of grapes. Two of them carried it on a pole between them, along with some pomegranates and figs. – Numbers 13:23

One cluster of normal grapes would fit in one’s hand.