Average Penis Size and Other Interesting Facts

Published : 04/30/2018 10:00:00
Categories : Blog

Average Penis Size: What You Need to Know

According to a study published in the July 10, 2013 Journal of Sexual Medicine that looked at more than 1,600 men’s average penis size, researchers found that when erect, the average size penis is roughly about 5.5” long (14 cm), ranging from 1.6 to 10.2” (4cm to 26 cm) long. However, the standard deviation is about 1” (2.66 cm), which means that about two-thirds of men's erect penises in the study are between roughly 4.5 and 6.5” long (12.5cm to 16.8cm). Another way to look at this is that almost 20 percent of all men have an erect penis size of less than 4.5” – this is about 1” shorter than average.

Average Penis Length

Take a look at the average penis length statistics – we think you’ll be surprised:

  • Average erect penis length: 5.5”
  • Average flaccid penis length: 3.5 – 3.9”

The Penis BookWant to know more about the male anatomy? Wondering about size, erectile dysfunction (ED) or premature ejaculation (PE)? Check out Dr. Aaron Spitz, MD’s The Penis Book to learn everything you ever wanted to know and need to know about the penis.

Facts About the Average Erect Length

Aside from size, there are a number of other interesting facts about erections.

  • Most apes have a bone, or baculum, to keep their penis erect, whereas humans rely solely on blood pressure. Biologists do not know why humans selectively lost this trait, but walking upright with this bone may have become a little uncomfortable anyway.
  • Even a little tiny fetus can have an erection. Ultrasound tests have shown that it can happen in the third trimester.
  • Men have "spontaneous" erections during the day that have nothing to do with sexual arousal.
  • Erections that occur while sleeping are common and a sign of a healthy penis – there is even a medical term for this: Nocturnal Penile Tumescence (NPT).
  • Men average about five of these erections per night.
  • NPT often occurs during REM sleep, where it’s believed the brain stops releasing a chemical that normally suppresses erections.
  • NPT also occurs when men have a full bladder – this may be a type of reflex erection or a mechanism to prevent urination while sleeping
  • A common slang term for the full bladder erection is “morning wood.”
  • NPTs are believed to contribute to penis health.
  • Although no formal studies have been published, based on astronauts’ accounts, it’s difficult – perhaps even impossible – for men to achieve an erection in space. Apparently, gravity plays a role.
Nocturnal Penile Tumescence

Does Penis Size Matter?

A man's penis can provide him great pleasure, as well as significant anxiety, at times. Anxiety normally arises from feelings of inadequacy with size, strength of erection or sexual performance. Here, we want to provide you with some interesting facts about the penis and possibly help you answer the question: what is the average penis size and is my penis large enough to fully satisfy a woman?

In a report published in BJU International, researchers brought together the results of 12 studies that measured the penis sizes of 11,531 men since 1942. They also studied what men and women think about penis size.

  • Almost 40 percent of men with an average size penis thought they were smaller than normal
  • 85 percent of women were satisfied with their partner's size

What Women Think

While size may be important to men, most women agree that on average, the size of a penis is really not as important as other things. In fact, more women complain about a penis being too big, rather than too small. Additionally, the majority of women care more about the emotional connection they experience during sex than they do about the size of their partner’s penis. Most women agree…it’s not just size that counts.

It's Not Just Size


Penis Size Trivia

  • Flaccid length is not a predictor of erect length. Some men have a relatively short flaccid penis that, when erect, will expand to an average length. These types of penises are known as “grow-ers.” Alternatively, while a “show-er” penis will appear large most of the time, it won’t get much bigger after achieving an erection.
  • An international Men's Health survey reports that 79 percent of men have "grow-ers" and 21 percent have "show-ers."
Growers and Show-ers
  • Only 6 percent of the male population needs extra-large condoms, according to manufacturers.
  • Most men underestimate the size of their penis.
  • Contrary to popular belief, there's little to no correlation between penis size and height, hand or foot size.
  • We often hear of race being a topic of discussion in relation to penis size, but in reality, the data shows only modest variation.
  • Because it reduces blood flow to the penis, smoking can shorten the average penis by up to 0.4.”
  • There is a scientific way to measure erections in a lab.
  • Because the Greeks associated a small penis with an artistic ideal of balance and moderation , penises on Greek statues were intentionally small – in contrast, a large penis was often associated with being elderly or a drunk.
Greek Statue
  • A barnacle’s penis can grow up to ten times the size of its body – they have the largest penis in relation to body size.
  • Stretching a flaccid penis is a typical way for scientists to measure length.
  • The Greeks believed that wind caused erections.
  • Men’s penises are typically darker than their body.
  • The penis stops growing when a man is in his early 20s.

Final Verdict: Size vs Stamina

Despite what many men may believe, size really isn’t all that important when it comes to satisfying a partner in bed. In fact, like we mentioned earlier, most women have more complaints about a penis being too big, rather than it being too small. Extremely large penises can be painful for a woman. A large percentage of women would be more interested in their man being attentive to the entire sexual experience as a whole, than they care about actual size.

Size vs Stamina

One large component that comes into play here is how long a man lasts. Much, much more important than the size of the penis is how much effort is going into the whole act. How much foreplay is there? How attentive are you to her needs? How long can you last? Women are sensual creatures who need emotional stimulation perhaps more than anything else – they would take a satisfying experience over a big penis any day. If you’re looking for a way to last longer in bed and satisfy your partner, you may want to start looking at some of the over-the-counter (OTC) products out there to delay ejaculation.

Promescent delay spray is the only product in the U.S market that is clinically backed with IRB certified research. It has relatively no side effects, and has been shown to allow some men to last up to 64 percent longer in bed. Now that’s the type of length your lady will care about…

Share this content

Add a comment

 (with http://)