If a woman ever suggested to me that I was "small," and her comment was unprovoked, I think I would quickly retaliate with the most hurtful comment I could muster and then tell her to get the f*** out of my house.
I have fortunately never experienced this. However, I did experience a situation where a girl knew about my large size before even meeting me (through rumours). Evidently she was expecting me to be even bigger based on what the other girls were saying. They were obviously impressed with my legitimate 8.5", but this one was quite a piece of work. She told me that I was "large, but not freakishly large." I had never asked for the comment, and she was the one who brought up my size and focused on it so much.
Needless to say I was both astounded and pissed. I completely lost interest in her, not because her comment had any significance, but because it made her sound both petty and psychotic. I guess the thinking in my mind was, if you can find one bigger, by all means good luck doll. Ironically, she did end up pursuing me relentlessly about three months later. I guess she never found her "freak." LOL. Personally, I think the internet, rather than reality, had warped her ideas on size.