I was extreamly clear with the problem I have with the majority of women on this site tryng to 'have it both ways' if you can't understand then I can't help you
Gillette has pointed out the flaw in your opinion above. Let's see if I can help you.
I am aware of three types of regualar female orgasm. Clitoral, Gspot and deep vaginal. So the first variable for a woman is which ones of these she can achieve and which ones, singular or combination she needs to be satisfied. The first two don't even need a cock, but if you are using a cock then the skill of the man is far more important, though girth and shape will help.
Let's throw in a few other variables regarding the emotional needs and psychology of the woman. Some women will say that they can't just have sex. I am not sure that I believe this completely, but it s certainly a barrier, and then there are women who want a big cocked man even if they don't need it.
Back to the physical. If you agree that men have two obvious dimensions, length and girth, and you stick with three definitions, short medium, and long, skinny, medium, and fat, then you have nine variables. So what about the vagina and vulva? You have the size of the openning, the volume of the vagina and then it's depth. Throw into this the variables of arousal, muscle control and stretching, then I think that you can see that the definitve size of a woman is beyond my inclination to compute.
But anyway, let's get back to the question how big is your cock. Upon reflection you could answer it like this.
1/ Do you need girth for your clitoris and Gspot?
2/ Do you need girth to feel full inside?
3/ Do you need length to stimulate your posterior fornix?
Then the detail is the relative size needs. Some women only need 5 inch girth, some women's cul de sacs are reached with 5. Then some women prefer 7 girth and you can still be going with 9 of length.
You could answer the question, how big is your cock, by asking how big is your cunt and what orgasms do you like?
But you can probably assume that someone asking this question is quite experienced, can have sex without you being the ideal boyfriend and understands the x by y system.
You could tell them that they aren't your type, even if you have the biggest wang in the district.
You could get it out and show them, or let them have a feel. Or you could say that you have had a lot of compliments. Never say that you have never had any complaints.