Is their length the key bit of info here?
I mean – I’d think you’d want a different length depending on how tall or short you are. If you’re really small, a long foil is a liability. It would be harder to control, I think.
But then, I am not a sword fighter. I have done some sword fighting, though and I KNOW I would not like to have a particularly long sword. You can hit from farther away, sure – but you’ll lose a measure of control, the farther away from your center of gravity the center of the sword’s gravity is.