The average length of the vagina is 6 to 7.5 cm (2.5 to 3) anterior (front) across, unaroused, 9 meters (3.5) posterior wall (back) long. And vaginal sexual arousal is expanded in both length and width.
The average penis size is different, the action is, on average, from 5.1 to 5.9 and from 12.9 to 15 cm or length is about 12.3 cm or 4.85 around.
The average penis size and variation by age, please click the following related questions: . View average length of a vagina