When Does the Penis Stop Growing?

Like most men you've probably been curious about your penis size, but when does your penis actually stop growing?

Dr. Jed Kaminetsky
Board Certified Urologist, expert in male sexual dysfunction
by Dr. Jed Kaminetsky Last updated 04/11/2024

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So, you've been searching on the internet for how to get a bigger penis.

Well, you are certainly not the first guy to do that. More likely, is that if you've never Googled how to get a bigger dick, you'd be in the minority.

Somewhere amid all the pills, creams, and proclaimed miracle treatments to increase penis length, you start to wonder, "When does the penis stop growing anyway?"

Could it be that you just haven't reached your full length yet? Do you truly need to increase penis length, or are you still waiting for peak growth?

Quick FAQs

There's currently no proven method to make the penis longer. However, options are available that can help increase girth. We’ll discuss those in further detail later in this article.

For most people, their penis reaches full growth while they are in puberty. However, a small percentage of men will see marginal growth into their 20s.

While it can never hurt to talk to your doctor about your penis size or just sexual health in general. Most people don't seek out medical attention unless they suffer from something like Peyronie's disease or if they suffer from a condition known as 'micropenis.'

Good news here, guys. A 2006 study found that 85% of women were happy with their partner's penis size. So, odds are you're more concerned about it than she is.

Here's a closer look at what age means to an adult-size penis, what the average size really is, and a few tips to possibly make your penis more satisfying for your partner.

What is the Age Limit for Penis Growth?

In general, the age limit for penis growth for the most men stops by the time they reach their early 20s. Additional penis growth beyond this age is relatively rare, with those that do experience it seeing only modest growth.

Common factors that affect penis growth

Some common factors that affect penis growth

The primary contributing factor when it comes to adult penis size is genetics.

Think of it this way: genetics determine how tall you are, so genetics can also define the average penis length and girth.

With that said, there can be environmental factors that get in the way of the penis length that you were genetically coded to have.

For example, boys with low testosterone levels may have impeded penile growth during puberty.

In some cases, a doctor will even recommend testosterone supplements if a pubescent boy has lower testosterone levels just for this reason.

Exposure to certain chemicals may also influence penis size.

For example, perfluoroalkyl compounds (PFCs) affect testosterone levels in the body, so mothers exposed to PFCs during pregnancy may have boys with less-than-average penis size.

What is the penis growth timetable?

What is the time table for penis growth

So, when does the penis even begin growing?

For the most part, the penis grows marginally throughout a boy's younger years, starting right after birth. However, there is no significant penis growth until entering puberty.

According to adolescent medicine, have shown that peak penis growth happens between 11 and 15 and involves about half an inch every year. So, this is also the age at which the penis grows the most.

Medically reviewed studies have shown that peak penis growth happens between 11 and 15 and tends to involve something like half an inch every year. The penis size may continue to grow beyond this point, but the rate of change is much slower.

Once puberty is over, the penis will stop growing for the most part, even though a few men may gain some minimal length or girth into their 20s.

Other changes that come about for males during puberty include:

  • The testicles grow, get thinner, and redden
  • Pubic hair starts to grow
  • More frequent erections and ejaculation
  • Nocturnal "wet dreams" begin

A good rule of thumb from Young Men's Health is to determine when your testicles enlarge. Once this happens, the penis goes through its growth spurt for about four to six years and then stops.

What is the average penis size?

Before you get too hung up on the answer, we should point out that most men wildly overestimate the average penis size.

What is the average penis size

In research of more than 15,000 men, the average length is, get ready:

  • 3.61 inches flaccid
  • 5.16 inches erect

Average girth (circumference):

  • 3.67 inches flaccid
  • 4.59 inches erect

Does penis size matter?

Does penis size matter?

Probably not as much as you have built it up to matter. You can have sex and a great sex life no matter how big or small you feel your penis may be.

Further studies, have shown that men are much more concerned about the size of their penis than their female partners.

In peer-reviewed studies, women's views about their partner's penis size were way out of line with the men's view about their own penis size.

85% of women are satisfied with their partners penis size

Over 85 percent of women were happy with their partner's penis size, while only 55 percent of men thought they were big enough.

Common Myths about penis growth and size?

Before you convince yourself that there's something wrong with the size of your penis by examining your shoe size or because you think you're incapable of pleasing your partner, check out these myths.

1: Flaccid penis size indicates the size of the erect penis

Not at all.

A flaccid penis can easily be about the same size as an erect penis. There's no real correlation here.

Some men don't get much bigger when erect, while others grow a lot. These differences are known as "growers" and "showers." Growers grow a lot compared to their flaccid size; showers do not.

2: Most women wish their partner's penis were bigger

Again, nope.

Several studies have shown that most women are pleased with their partner's penises, even though most men think they fall short.

So, before you assume your sexual partner is displeased, research shows that's usually not the case.

3: Shoe size and penis size are related

Is shoe size related to penis size?

No such thing. Not true.

Foot nor hand size have anything to do with the size of your penis. So, if you've got ginormous feet and can't figure out why your manhood doesn't measure up, relax; you haven’t been cheated.

You weren't. And that other guy with oddly long fingers could very well be in the same boat.

4: Longer penises deliver more sexual pleasure

In reality, girth means more than length where sexual satisfaction is concerned.

Many factors contribute to sexual pleasure, such as desire, sensitivity, and even relationship status. So, your erect penis length may have little to do with the overall satisfaction for you or your partner.

One thing that most assuredly matters is how long you last. If you have issues with lasting long enough, check out Promescent Desensitizing Spray.

Can I make my penis bigger?

Can you make your penis bigger

So, is making your penis bigger after the penis stops growing just wishful thinking? Is there such a thing?

In reality, you can't give your body some magic treatment and make your penis grow, and even if you could, you’d have to get in line behind every other man on the planet.

Nevertheless, you can try a few things to increase penis size to some extent, some more effective than others.

Penis pumps

Penis pumps are vacuum devices that help men achieve an erection by forcing blood to engorge their shaft and head.

This tool is valuable for its intended purpose, but it may not do a great deal to increase the actual girth or length.

You could very well see a slightly noticeable difference, but this change won't be anything to really brag about for most men, and the change is not permanent.

If you decide to take this route, be mindful of usage directions. The reason being is that it is entirely possible to cause permanent damage to the blood vessels in your penis with too much vacuum pressure.

In which case, you would have an even bigger problem, possibly not getting a full erection.

Penuma implant device

The Penuma implant device is a surgical penis enlargement option.

Penuma is a silicone implant that gets inserted under the skin of the penis and comes in different sizes.

The surgery is a short outpatient procedure, typically (45-60 minutes), and the FDA 510(K) certified implant will increase the girth of your penis. It basically transforms you from a grower into a shower.

Caution: No surgery is without risks and since this is your penis we're talking about, do your homework!

You may decide that the size matter is enough to encourage you to accept these risks. Just be sure to talk to your healthcare provider in-depth to weigh the benefits and risks.

Cock rings

Cock rings to hold extra blood in the penis

Cock rings are a great non-surgical option. Their job is to hold all that extra blood and fluid in the penis once it is erect, and they can be an effective tool.

Nevertheless, cock rings are limited when it comes to making penises bigger. You may see a slight uptick in girth or even how long you maintain an erection, but that's about all.


Can jelqing make your penis bigger?

Jelqing is an exercise a man can do to "stretch" the tissue and skin of the penis in an effort to increase the length of the penis.

The process involves doing extensive stretching several times a day. This stretching causes tiny tears in the tissues. In theory, this may make the penis look a bit bigger when it heals.

Jelqing can also be done with traction devices that attach to your manhood and hold a stretch for several hours every day.

Not only is jelqing uncomfortable, but there is also minimal medically reviewed information about whether this truly works for long-term penile enhancement.

That being said, those that do it swear by it.

Penis sleeves

Many men turn to penis sleeves, which can make your penis appear bigger.

These sleeves slip over the shaft to add more girth, but some also cover the penis head and add a few extra inches of length.

Bottom line, if you want to know what a bigger tool would look like or feel like to use, these can be a good addition to your sexual experience.

When should I see a doctor about my penis size?

When should you see your doctor about your penis size

Any time you have concerns about the size of your penis, your testicles, or just sexual health in general, it doesn't hurt to talk to your healthcare provider.

If you have excessive concerns about penis size that get in the way of your ability to have a good sex life, it can be helpful to visit a board-certified urologist.

These professionals can:

  • Answer questions about penis size
  • Offer reassurance about whether your penis size is considered "normal"
  • Diagnose existing conditions that affect sexual function
  • Provide information regarding penis enlargement

Without question, you should definitely seek professional medical advice if you suspect any of the following conditions that can affect sexual ability.

Peyronie's disease

Peyronie's disease leads to problems with a curved erection, which can be painful and get in the way of sexual satisfaction.

This condition is caused by some type of injury to the penis that ruptures the connective tissue.

When the penis is injured, fibrous scar tissue forms during the healing process, and this causes a change in how the penis looks when erect. However, it can also make your penis appear smaller.

Men with Peyronie's disease may experience:

  • Abnormal penis curvature, especially when erect
  • Pain with an erection
  • Narrowing or bulging of the penis shaft
  • Changes in overall penis length and size
  • Problems achieving or maintaining an erection

It is essential to see a doctor as soon as you recognize signs of Peyronie's disease because early treatment can mean the best possible outcome for the deformity.

However, it is also possible for the symptoms to subside over time, although this can take 12 months or more.


Many claims of micropenis are simply unfounded. In reality, micropenis is a rare condition that affects only about 1.5 in 10,000 male children in the United States.

The scrotum and testicles are present with micropenis, but they may simply be underdeveloped.

The penis must have at least a 2.5 standard measurement deviation from the average at a specific age to be diagnosed as a micropenis.

Doctors consider it to be micropenis if the fully stretched penis measures less than 3.66 inches for an adult.

Diagnosis of this medical condition is often made during childhood.

However, talk to your doctor if you believe you have what is medically referred to as micropenis. While there is no cure, there may be surgical options that can help.

Important takeaways

There are a few things you can do to achieve penis enlargement, but most offer minimal change that's not long-term. And, the ones that actually do change the size of your penis are pretty intense and risky.

It also bears repeating that surgical procedures to enlarge the penis are risky and should be avoided unless absolutely necessary.

The easiest way to enlarge your penis is to lose weight! Half of the erectile bodies or corpora cavernosum are internal.

The more lower abdominal fat, the more the penis is internal; hence the less it extends out from the abdominal wall. It appears smaller flaccid and has less penetrating length.

For most men, it is more feasible to focus on being good with what they got because what they've got is probably perfectly fine anyway.

Dr. Jed Kaminetsky

Dr. Jed Kaminetsky

Dr. Jed Kaminetsky M.D. is an American Board Certified Urologist and earned his Medical Degree at New York University. In his tenure he became a member of the American Urological Association and the American College of Surgeons. Dr. Kaminetsky pioneered the minimally invasive Rezum BPH treatment and is an expert in male and female dysfunction.


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The Content is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition.

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