Hmmmm, this is the male half of the profile here and I thought I would add my .02 cents. The size of the other male doesn't ever bother me. I can't say as I compare myself to them or really care.
She, on the other hand, does have an interest in larger sized males. She has been hoping to meet (or should I say, "meat!")

a male of comparable size or larger than I. ((I don't think I'm that large, but have been measured by quite a few of my lady friends since I was 16 years old at 8". I have never measured it myself and really don't know why the women who have done so did measure me.))
In our search of partners to play with, we have met a few very kind, intelligent men with senses of humor. In the vast numbers of single males that can contact you, we've been lucky to meet the cool ones we have. The ONLY catch has been they have, one and all, miss-represented themselves in the area of size. We had one guy who's nude body shot was NOT him, one who was seemingly enormous (I have to admit, even I was impressed) but it turned out he was just a very tiny man with tiny hands and an average (i.e. ~ 5") cock. The 1st we invited home was a bit smaller but he went limp suddenly. Now, this is HER theory, it happened when she took both of us in hand and held them to either side of her face as she knelt in front of us. She said as soon as she did that he deflated...she thinks he may have been intimidated by me but I don't know...I think it was just too much too soon for him.
The 3 single males we've tried to play with all had problems in maintaining an erection to one degree or another. The result being that she thought at first it was her, which is silly because she is stunning. I still think it was just a combo of bad luck and the men being in an odd situation.
So, in answer: for the male here....no problem either way. For her: at least 7"....