I weigh about 260 pounds, and nobody has gasped in the street about how huge I am. (One person gasped when I said I was definitely not 120 pounds, which was his wildly off-base estimate. What's that, one of my boobs? FFS.) Unless this woman is much shorter than I am, I'll guess that she may be as much as 300 pounds.

...she might be much shorter than I am. I'm tallish.