The length of the vagina varies among women of child-bearing age. Because of the presence of the cervix in the front wall of the vagina, there is a difference in length between the front wall, approximately 7.5 cm (2.5 to 3 in) long, and the back wall, approximately 9 cm (3.5 in) long. During sexual arousal, the vagina expands both in length and width. If a woman stands upright, the vaginal canal points in an upward-backward direction and forms an angle of approximately 45 degrees with the uterus. The vaginal opening and hymen also vary in size; in children, although the hymen commonly appears crescent-shaped, many shapes are possible.
the length of the vagina varies among women of child-bearing age because of the presence of the cervix in the front wall of the vagina there is a difference in length between the front wall approximately 75 cm (25 to 3 in) long and the back wall approximately 9 cm (35 in) long during sexual arousal the vagina expands both in length and width if a woman stands upright the vaginal canal points in an upward-backward direction and forms an angle of approximately 45 degrees with the uterus the vaginal opening and hymen also vary in size; in children although the hymen commonly appears crescent-shaped many shapes are possible