Although it is usually a question that guys ask about the male genitalia, you'll find that it's not only men who worry about whether or not size really matters. Indeed, while men will ponder over the length and girth of their penis, many women will also be concerned that their vagina is too big or small and question whether it could affect their sexual performance.
"Our ability to understand size as it relates to sexual function is poorly understood," Christopher Tarnay, director of the division of female pelvic medicine and reconstructive surgery at the UCLA Medical Center, told WebMD. "But in the last ten to 15 years, there has been a lot more attention paid to the field of sexual medicine."
The important thing to remember is that the vagina is an elastic organ, and it can go from being very small to expanding to large enough to allow a baby to pass through it. This is because the walls of the vagina contain rugae (also found in the walls of the stomach), which allow it to fold together and collapse when unused, then expand when necessary.
According to WedMD, the most commonly used measurements to look at the size of vaginas come from Masters and Johnson’s work from the 1960s, which found that vagina lengths, unstimulated, range from 2.75 inches to about 3.25 inches in women who had never been pregnant.
When the women were aroused, the length of the vagina increased to somewhere between 4.25 inches and 4.75 inches. But, how does this relate to sexual satisfaction and how can we tell if size really does matter?
"It probably doesn't matter," Mr Tarnay said. "There is such a wide range of normal, one can be completely assured that in the absence of prolapse, length has no impact on sexual satisfaction."
Indeed, while not enough research has been done to know for sure the effect that size has on sexual experience, it seems that in the case of length it shouldn't really be an issue.
However, when size does seem to make a difference is in the case of the vaginal opening, as many women say they feel looser following childbirth and would like to tighten their vagina to improve sex. And in this case the best thing to do is to try Kegel exercises to strengthen the pelvic floor muscles of the vagina.
"Women who are able to contract the pelvic floor muscles can increase or decrease the size of the hiatus (vaginal opening)," added Mr Tarney. "Increasing pelvic floor muscle tone can reduce looseness."
It can take a bit of time for these to work, but if you do the exercises on a regular basis, they should start to make your vagina feel tighter and help improve your sex life if you were concerned about your vagina being loose or too big.