The shape of a vagina can vary from person to person. Some vaginas are oval like an egg, while others can be more cylindrical. The opening of the vagina is between the urethra, through which urine leaves the body, and the anus.
They can stretch to allow something to go in or out (like a tampon, finger, penis, or baby). When you're not sexually aroused, your vagina is about two to four inches long (or deep). When you're aroused, it can stretch to four to eight inches.