Yep, we're talkin' about the same bear...the one in the thread you linked to above is off the record mark by- according to the sites I investigated- about two feet in total length and 400-600 lbs in weight.
And that's for a Brown Bear, Polar Bears can get 20-30% bigger. Truly monsters.
The full impact of their size only hit me one day when I realized that a truly huge bear, at 12, 13 feet or more in standing height, could look over the back of most african elephants! Now that's damn big.
Once a human being gets away from our man-made, artificial, polluted (and just generally crappy) world and hits the real-live God-given world the entire spectrum of the food chain changes drastically...don'tcha think?