quickly on the breast thing, they have to go with the person.
re the *wink wink* size i know i'm not a girl but i do have some info on that, from my ex. I'm not gonna give out a mesurment here so dont ask!
When i was sleeping with my ex she told me i was to large, now until then i didn't know this was possible. Appartently its depends alot on the girl, just like some girls have bigger boobs some girls can fit a larger dick without it hurting them. I'm talking length here basically in laymens turns, you start pooking an organ and this hurts her or you got to the end (of whatever that part of her is called).
In general a taller girl can fit larger then a smaller girl can. My ex was 5'5 (in canada average height is 5'4) so i'd say she could handle a bit above average. you can draw your own conclusions, bascially for her not to get hurt i had to hold back an inch.
hope that wasn't to much detail for ya dude, but you did ask and i'm guessing the ladies weren't gonna be as specific. I hope that helps you in some way.