When girls talk about their guys penis size, they'll talk about length, and width, and if your good with it. I like thick and sort of long but not too long because they can hurt to take and are way harder to deep throat. Otherwise, it's a non-issue to most girls. For oral he's a little too big, because he's the only guy I've been with that I can't deepthroat. If its smaller than my preference then I won't say much just so the guy can keep his dignity.
You girls can't handle fat dicks.
‘With a foreskin, I know what I’m doing’: 20 women tell us what makes a good penis and why
Of course then the dick just becomes a part of a picture of his body and not the focus. The style of penis I prefer is any size or shape, wielded by a confident, enthusiastic partner who is interested in my pleasure, as well as their own. And, I hate baggy foreskins, they make cocks look smaller. As far as what I'd say IF asked, I suppose that I'd give a general answer that doesn't make him look bad. Maybe I'd say "big enough" or "just right.