At what age penis start and stop growing?

Penis growth is influenced by the hormones of puberty. As such, the penis begins to grow more rapidly than usual between ages 10 and 14 and can continue to grow until ages 16 to 21. Many young men become concerned or self-conscious about penis size during adolescence, but the vast majority reach a completely normal penis size by the late teen years.

The penis will get longer and thicker. The rate at which growth occurs varies from one person to another. Once puberty ends, the penis will stop growing. Other changes that affect the penis and genitals during puberty include:

• Testicle growth
• Thinning and reddening of the testicles
• Pubic hair growth around the penis
• More frequent erections and ejaculation


In addition to other physical changes experienced during puberty, such as becoming more muscular and getting taller, this is the time when your penis may become erect in response to becoming sexually aroused, during sleep, or even at unpredictable times. Your testicles begin to grow larger and pubic hair begins to emerge.

The most rapid growth occurs between the ages of 12 and 16. The penis grows in length first and then begins to grow in girth (width). The changes in your penis size can be sudden and fast. You may notice that your body, including your penis, goes through rapid changes for a few weeks, and then remains the same for months before changes begin again.

Average penis size

Though men often underestimate the size of their penis because of the angle at which they see it, or misconceptions about how big an average penis measures, chances are good that your own penis is well within the range of most men’s sizes. Research on 15,521 people from around the world reports that the average penis length is :

• 9.16 centimeters (cm), or 3.61 inches (“), when flaccid
• 13.12 cm, or 5.16″, when erect

The average girth, or circumference is :
• 9.31 cm, or 3.67″, when flaccid
• 11.66 cm, or 4.59″, when erect

Is it possible to make the penis bigger?

There are many products including devices, pills, and creams — that claim to increase penis length and girth. The internet also holds many claims that stretching exercises may have similar effects.

According to the Urology Care Foundation, however, “almost none of them work.” That said, there is some limited scientific research to suggest that penile extenders may increase length (but not girth).

Instead of using unproven devices and techniques, some people may benefit from improving their self-esteem and body confidence by seeking counseling and consult sexologist as much as possible.

When to see a doctor

If you feel that you might be late in going through puberty or you have concerns that your penis is abnormally small, you should consult with your doctor. There is no need to feel awkward about bringing up the topic. Your doctor has studied the normal and abnormal aspects of physical development, has heard all types of concerns, and will be able to answer your questions so that you don’t have to worry and wonder anymore.

If you’re a parent and you suspect your baby has micro penis or any other abnormality regarding his genitalia or development, talk with a pediatrician. You may need to see a urologist who treats children.


In general, your penis may continue to grow for one or two years after you stop growing in height or four to six years after your testicles enlarge. You will reach your fully developed penis size between the ages of 18 and 21.

As research seems to suggest, most males overestimate the average penis size. Studies also indicate that most females are happy with the size of partner’s penis.

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