How to measure penis length, is my penis too small/ too big?


Penis Size: What’s Normal, What’s Not

You might think that as long a man’s penis works, he would have no problem with it. You would be wrong.

Penis size is a key element of a man’s self-image. Yet when he’s not boasting to other men, the average man significantly underestimates the relative size of his penis.

Here’s an example: Over a two-year period, 67 men asked an Italian hospital for surgical correction of a small penis. All turned out to have normal-size penises.

“A few days ago, I had a patient who spent an hour taking measurements of his penis and thinking it is too small,” Gilbert says. “Yet it was normal.”

That man isn’t alone. About 45% of his brethren want a bigger penis. Never mind that 85% of heterosexual women say they are satisfied with their partners’ penis parameters.

How to Measure a Penis

Men may be surprised to learn that penis length isn’t measured on the erect penis. Too many variables are involved.

Instead, the most reliable penis measurement is called SPL — stretched penis length. The longer a man’s SPL, the longer his erect penis length, according to studies done on brave young men who volunteered to have erection-stimulating penis injections.

To learn your SPL, measure the penis while it’s flaccid. Press the ruler tight against the pubic bone at the base of the penis. Don’t just measure from where the penis separates from the scrotum, or you’ll lose precious centimeters. Now gently, but very firmly, stretch the penis as far as it will go. Measure from the pubic bone to the tip of the stretched penis.

Did you get five and a quarter inches? If so, you are exactly normal. Most adult men are within about a half inch of 5.24 inches, according to statistics Palmer has compiled. Nearly all studies of penis length come up with a similar measure.

If you’re a little smaller than that, you’ve got lots of company. Just as many men are below average penis size as above it.

How big is big? According to Palmer’s statistics, only 0.6% of men have an SPL of 6.8 inches or more. But too big isn’t what men tend to worry about.


There is, of course, such a thing as a very small penis. The medical term “micropenis” applies to the 0.6% of men with the smallest penises. According to Palmer’s statistics, an SPL of three and two-thirds inches or less indicates a micropenis.

Even then, U.S. doctors hesitate to recommend surgery for a man whose SPL is longer than three inches. That’s because surgery is controversial and risky.

Micropenis isn’t usually something a man discovers when he’s an adult. It’s usually caused by genetic or hormonal abnormalities that cause other, more serious health problems early in life.

That’s because the penis starts to develop when a fetus is just 8 weeks old. By week 12, the penis has developed and begins to grow. During the second and third trimesters, male sex hormones cause the penis to grow to normal length. Factors that interfere with hormone production and hormone action stunt penis growth.

When discovered in infancy, micropenis can be treated with testosterone, which can stimulate penis growth in childhood, even after puberty. While the safety and long-term efficacy of this treatment remains to be proved, available data suggest the treatment does not affect normal development during puberty.

For adults with micropenis, the options are few.

“For true micropenis, there is not much you can do that is adequate for the adult patient, except for putting in a penile prosthesis,” Gilbert says.

Fortunately, micropenis is a rare condition. Far more common is what Palmer and colleagues call “the constellation of conditions that make the penis look diminutive and small” — inconspicuous penis.

Many men worry about the size of their erections. Many more worry about how their penis looks when it’s limp, studies find.

So how can a man know if he’s normal, super-sized, or small? Not by his shoe size, a common and disproved myth about estimating penis length. Like so much else in life, direct measurement is the key.

Can Devices Make a Small Penis Larger?

Traction devices that stretch the penis may actually add an inch or so to penis length, based on small studies and anecdotal reports. Gilbert says he is following two patients who are using these devices in an effort to make their penises longer.

“These devices have to be worn for several hours a day, for many months,” he says. “Most people, even if they are highly motivated, don’t have that kind of time. So I’m not sure a lot of patients have the time or energy or perseverance to do that.”

Vacuum devices may help men with erectile dysfunction achieve an erection — but they do not make the penis larger.

Can Regenerative Medicine Make a Small Penis Larger?

However, there is one area of research with intriguing possibilities: regenerative medicine. Scientists have been able to grow animal penises in the laboratory by seeding scaffolds with the animals’ own cells. These penises then were successfully transplanted.

Already a group of researchers in Beijing, China, have reported using a similar technique to treat 69 patients with what they called small penis syndrome. In this case, the tissues were grown from the patients’ own scrotal skin and grafted to their penises to increase their girth.

“With regenerative medicine, the sky is the limit,” Palmer says. “We might have this as an option down the line.”

“Regenerative medicine is still not ready for prime time,” Gilbert says. “These things have a lot of potential, but nothing we can offer to patients in the near future.”


About yuan ade sukma, MD

I'm an Indonesian doctor. I Believe that science and knowledge do not belong to anyone in the world. Science and knowledge is meant to be shared to make the world a better place to live. But if you find any material posted here is violating any copyrights, feel free to contact me and I will delete that. I believe that someday my blog can change the world. I BELIEVE in the POWER of WORDS! Do you..?
This entry was posted in Miscelaneous, testosterone and tagged , , , , , , . Bookmark the permalink.

16 Responses to How to measure penis length, is my penis too small/ too big?

  1. jazimu says:

    Very Informative it is.

  2. warpimp says:

    I’m 28 I’ve always thought I had a below average penis length with above average girth. Never had a complaint and I’m embarrassed I’ve been with as many women as I have but thought they were being polite. Just measured using your method and got slightly over 8 inches which is about the same erect. So I feel better still self conscious but I’ve over come that because girls say its got a nice shape and looks good. Still think its small but not much I can do about it.

  3. Christian says:

    If you don’t have a ruler you could download Image Measurement from this site: and take a picture with an object which you know the size of along side. Remember that the Picture must be taken in from an perpendicular angle.

  4. ali abasi says:

    please healp me i need medicin my penis is small im sad i want to buy medicin but i dont know how my email thank you

    • there is no medicine to increase penis size. The only way to increase penis size is taking hormone therapy BEFORE you hit puberty (appr 15 yrs old). Size is not the main parameter of satisfaction for sex. More importantly the technique, erection and ejaculation matters more than just size.

  5. Yolo says:

    I just measured and found that I’m about 4inches plus..does that mean its micro. I am about 27yrs. I do have sex with strong erection but I am shy when it’s flaccid. Is there anything I can do about it. Thanks for your wonderful blog.

    • 4 inches erection penis is normal, but below average. micropenis is when the size is less than 7 cm or 3 inches. you can still satisfy your partner. woman satisfaction is more than about the size of the penis, but also the foreplay, technique also afterplay. I will not recommend any penis extender/ enlarger out there, the risk is outweigh the benefit. wish you the best

  6. lukreus says:

    What about the term “grower” and “shower”
    The grower guy will have shorter penis in flaccid state, right? will it be still accurate if we measure penises when it’s erected?
    Accutally very good information you share there, i always think that we measure it from where the penis-scrotum is separated, i never thought that it should be from pelvic bone 🙂

  7. Ray says:

    This article is a lot of hooey. Don’t take much of this crap to heart, whether for the good or bad.

  8. tanu says:

    Sir my penis size is 3 cm sir my penis is micropenis please suggestion me

  9. monir hossain rony says:

    nice.this website needed all of men.thanks.

  10. shawn thomas says:

    i performed the measure test and from the pubic bone to the tip of the penis stretched,it measured almost 8 inches…having a well endowed penis is a hassle sometimes because amost every woman I’ve been with end up making sex uncomfortable because I’ve yet to find a woman who can take it like a champ in every position and not complain about it afterwards. A big turn for all the men out there, work with what god gave you and be a beast while doing it.

Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s