Okay, now I know gals have a bad rep for statistically being unable to reasonably estimate the length, girth, et cetera, of a guy... But we're not the only ones bad with numbers. I've noticed a lot of guys overestimating a girl's weight--I'll explain how I know they're over in a bit--because we females are just not as densely packed as you guys. When we exercise and build muscles, so long as we aren't using steroids or what have you, we'll only get to a certain point and then there's really no advancement from there. We can't get ripped and huge, but we can get toned and firm.
Now, as to how I know these estimates are over the mark, that's pretty easy. Unless you're a lady who's six feet tall, 160 lbs is probably too much for your frame. I've seen a lot of the other ladies' showcases, and I've read that their pictures are accurate so if she's not justifiably a BBW, odds are her weight isn't in the realm of obesity. For a quick rule of thumb, there are actually a whole lot of resources including this chart for men and women on healthchecksystems.com, a women's chart courtesy of commonsensehealth.com, and a basic break-down of BMI calculations along with the chart below, courtesy of cancer.org.
So. How do you folks feel about estimates? Do you err on the side of caution and low-ball them, or do you just throw out whatever number you come to first? Any instances you recall of memorable miscalculations that proved funny or insightful? We all love to flub our numbers, but I'd like to try and have an open and honest discussion about bodily estimates of all sorts.