If you're comfortable, place your finger inside your vagina and feel along the vaginal wall. You may notice it feels a little like the roof of your mouth. If you push a little farther, you may feel your cervix. It feels like the tip of your nose.
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.