Well, most people in biblical times were quite short, around 5’4”—5’5”. As long as they didn’t give the job of going around measuring things to Goliath or someone like that, it would probably would have been pretty consistent. Too, I’m guessing at the beginning of a building project, there would be an agreed upon standard cubit and they’d cut a few sticks at that length to use throughout that project. Or maybe there was an official standard that was already mandated locally. Something like that. Even as far back as the time of Hammurabi, they had building codes.
yes, they were freakishly clever those Egyptians
the giants described in the bible date from and look very much like the people of the steppe herders in what is modern day ukraine called the yamnaya people. They were the first to tame the horse. They invented the chariott and they mined copper in the early bronze age. They were also head and shoulders bigger than everyone else. They took over europe and india, turkey and persia. they pushed into syria but were only sporadic in Israel. Their dna footprint is slight but that looks like about how they’re described in the bible: big powerful but few in number. Oh and here is the kicker. They expanded out from the Ukraine by killing all the men in the villages they encountered and taking the females as wives. That’s what the bible describes.