I never put much stock in height estimates and even less in weight estimates.
Unless someone goes out and checks a reference branch etc, its likely to be a wild guess.
Unless some one has considerable experience in estimating size and weight, they don't
have good references.
The tallest reported height with any reliability is 14 feet based on comparison with
suspiciously tall blackberry vines
I suggest that interviewers of sightings collect a number of photos of athletes
and bodybuilders to help people estimate the relative bulk of the sighted creature.
If one has a good estimate for height and bulkof a comparable human, it is easy to extrapolate the weight.
Weight increases by the cube of the increase in height. For example, if we compare
Shaq at 7'1" and 325 lbs with a 9 foot creature of similar bulk, the weight would be:
108/85 =1.27 the cube is 2.05 so a 9 footer would weigh 650 lbs if he's built like
Incidentally, Robert Wadlow topped out at 1 inch shy of 9 feet weighed 490 lbs.
He is considerably thinner and a lot leggier than a typical Bigfoot.
Andre the Giant weighed about 500 lbs in his later career at a billed height 7'4" this
would extrapolate to a 700 lb 8 footer.(a photo on tallestman.com shows him 3 or 4
inches shorter than 7'2" Wilt Champberlan) In that
case he corresponds to an 830 lb 8 footer.
Tallestman.com is an interesting site if one is interested in giant humanoids. Almost without
exception the tallest humans have pathological conditions. Can Bigfoot height be pathological
in the sense of genetic aberrations