Originally Posted by
kross57
And, unless you measured me, how would you know what my dimensions are and if they are unusual?
Because statistics, that's how.
Anthropometric studies of the human body have been done many times. For a normal person at a specific height, leg length, arm length, hand size, and torso length all fall within a narrow range. Certainly a narrow enough range to fit on a bicycle specified by rider height.
Also, I've personally gathered bike fit information and fitted thousands of people on bicycles. You're not special or unusual (at least your physical dimensions aren't).