7-9 inches and nice and thick nice and big but not to the point that it hurts and around 6 inches 4 anal.
I used to think bigger is better. Probably because i didnt have that much experience.
But my last boyfriend was only about 4,5 inches, and about 3inch thick. But he gave me the best sex experiences ever.
My last boyfriend, (and we may be re-uniting)!!, was the largest of my previous guys, (3), and I think the mental thing of seeing a large erect penis plays with a girl's mind.
-I know it did mine.
I'm not a size queen, so I don't need a huge cock, or really fantasize about huge, 12" cocks. That being said, I enjoy/value girth more than length. My pussy is <6" in depth, so feelings of "fullness" come from the width of a man's cock, and not the length. I also do not relish the feeling of my cervix being rammed, so I don't really want anything >8".
To answer your question, a cock that is average in length, but above average in thickness would be incredible. Don't forget: the actual hardness of a cock is important, and a huge cock isn't that great if the hardness is compromised. Cock rings aside, men: don't smoke or drink in excess or live an overall unhealthy lifestyle; your sex life and the circulation to your cock will pay the price. Also, my ideal cock would last >5 minutes of fucking, spew tasty precum (I recently had precum that was oddly foul), does not have any STI's, actually gets hard when desired/be responsive to stimulation, be clean and pleasant, and be attached to a kind, sexy man who is amazing in bed. Is that so much to ask?