By comparison, Robert Wadlow of Illinois was 8'11".
They used metric cubits...................
Cubits are considered to be somewhere between 18” and 24”. Goliath could be up to 13’ tall by the higher measure.
Right or wrong, I believe that details of stories recorded in the Bible, generation after generation, evolved with details becoming more spectacular, even exaggerated. I don’t think it should take away from that fact that the characters and/or events were extraordinary, notable and Devine.
For instance, I don’t think Moses lived to 120 years or that Noah was 950 years old. Instead, I believe they each out lived several generations of people and were considered VERY old and wise. If 3 or 4 generations of people knew these folks and passed stories down for hundreds (or thousands) of years later before first being recorded, then it can be concluded their existence, leadership and wisdom was inspired and directed by God.
That’s a Nephilim, baby!