A Little Bit About Female Anatomy: AKA How Big is the Vagina?


vaginaWe talk a lot about penis size here at PEGym – obviously. However, it’s important to understand a little bit about female anatomy, to fully appreciate your partner and their bodies. I’ll start this discussion off though with two notes:

  • Note 1: Every woman is unique, this holds true for her vagina. For this reason, we are talking about typical. Just as every man’s penis is unique. And, just as a the unique size and shape of a man’s penis shouldn’t affect their value as a partner or as a human being, the same holds true for those of us across the gender aisle.
  • Note 2: I was surprised at how few quantitative, empirical studies done on vaginal size. There are studies out there, but they are few in number, and their number of study participants often range in the dozens. For this reason, obviously more studies need to be done, to ensure the averages these limited studies have established are accurate.

How Big is the Vagina

A study published in the  May 2005 issue of the British Journal of Obstetrics & Gynecology included 50 women. The study found that the vaginal canal of these women ranged between 2.5 inches and 4.9 inches in length.  Read that again.  The longest vaginal canal, from the vaginal opening to cervix was only 4.9 inches. The average length was right around 3.5 inches.

But, How can that be? The mystery of human anatomy and the miracle that is a woman’s body. Like a man’s penis grows during an erection, a woman’s vaginal canal can nearly double in length during intercourse.  This means, the maximum length of the vaginal canal, for the average of the women in the study would be just under 7 inches.  That’s max.

Which means, if your penis is longer than 7 inches, you could be hitting your partner’s cervix, if you’re not careful. This isn’t the most pleasant sensation for many women. However, as I’ve mentioned in the past, a longer penis does have the ability to manage some sexual positions easier than a shorter penis.

When it comes to width, the best source comes from a 1995 study published in Obstetrics & Gynecology. This study participants demonstrated vaginal canal width between  .83 and 1.37 inches in diameter. A little 7th grade geometry tells us that’s a circumference of 2.6 and 4.3 inches. There were only 2 women in the study that were on the low end of that scale and both reported experience pain during intercourse. On average, women in the study were right around the 4 inches in circumference range.

Again, the human body is amazing, and the female body can stretch (up to the average 15-inch circumference of a newborn’s head!)  However, the point is, unless your partner is significantly above this average, most men’s girth is within this range. Of course, a thicker penis does provide a “fuller” feeling that some women enjoy.