Penis Size During Puberty

Guest Author: Cheryl Greene

Background

A number of years ago a parent wrote to us with a question about the size of her baby‘s penis. Dr. Greene answered it in detail in a post titled Penis Size Defined. That post was specifically addressing issues of penis size in babies and has nothing to do with penis size during puberty.

Imagine our surprise when boys going through puberty found his post when searching for information about penis size during puberty. And, an even greater surprise when they started sending in questions about their own penis size during puberty. Lots of questions from lots of boys.

Our Response

In our opinion, many of the questions from teenage boys asking about their penis size during puberty were genuine and deserved to be addressed. Clearly, this is a topic where boys are looking for answers.

Scientific Studies on Normal Penis Size During Puberty

Dr. Greene did a recent review of the scientific literature on normal penis size throughout puberty. The studies he found were old, had a small sample size, were contradictory, or were for a particular ethnic group. He was surprised to find no recent study with a large enough sample group and consistent methodology to be considered definitive. What he did find varied wildly. In some studies, there may have even been national pride bias.

As the Executive Producer of the site, I still felt a need to address the many questions submitted by readers, so with Dr. Greene’s encouragement, here are my opinions. Please note: I am not Dr. Greene and I am not a doctor. Keep that in mind when reading my post.

My Thoughts on Normal Penis Size During Puberty

Reading the questions submitted by readers prompted me to do my own online research. I am not a physician or medical expert., but I hope my observations are helpful.

Age – Individuals enter puberty at very different ages. In general, girls are younger than boys upon starting puberty and there is a disturbing downward trend in the age of onset of puberty by both boys and girls. In general, puberty in boys can start as early as 9 or as late as 14 and still be completely normal. The average age has dropped to 10.

Stage – From the time puberty starts until it is fully complete can be several years. It often takes 3 to 5 years from onset to completion. Penis size during puberty is greatly influenced by the stage of puberty. During this time there are many changes. The Body Book for Boys is a good resource that addresses these changes in detail. The peak age for penis growth is usually 12 to 16 years old – about the same time as the growth spurt in height.

Porn Lies – The men in porn are often not normal. Literally. The images are enhanced. This is true in the beauty industry as well. It’s no wonder we all have body issues. Here’s one of my favorite examples of how images are altered to make them more appealing and to make normal people feel bad about their own bodies.

What We Do Know about Penis Size During Puberty

Before Puberty – The average stretched length of the penis before puberty is somewhere between 2.1 and 2.9 inches*.

Adult – The average stretched length of the adult penis (after puberty is complete) is between 4.6 and 5.8 inches (though a more recent study of 6200 boys, mostly white, from Bulgaria, put the average at 3.1 to 4.3 inches. There’s a lot of variation between studies!)

During Puberty – It depends.

Penis growth depends more on Tanner Stage than it does on age.

When to Freak-out – Okay, it really should be “when to see your doctor,” but I did get your attention.

If you’re worried that your penis size during puberty is not developing normally, it’s really okay to see your doctor. You don’t need an excuse, but a great time to bring this up is during an annual check-up. During puberty, you will normally have your physical exam without a parent in the room, so this is a very easy discussion to have with your doctor. Your pediatrician hears these questions a lot– so don’t think you are the only one asking about your body and how it is changing (or why it’s not changing)!

Here are some sample questions:

• What stage of development (or Tanner Stage) am I currently?
• Is my penis within the normal size for my stage?
• If I continue to progress at this rate, in your professional opinion, how large will my penis be when I reach adulthood?
• Am I normal?

*How to Measure Penis Length

We get a lot of questions about “flaccid length” versus “erect length.” Neither is preferred in the medical literature when discussing penis length. The standard is stretched penile length.

To measure your penis size, stretch the penis gently and measure from the bone at the base all the way to the tip. Be sure to depress the surrounding fat pad to get all the way to the base. Using a wooden, metal or rigid plastic ruler is helpful to be able to depress the fat pad and get an accurate measurement.

What Can I Do to Increase My Penis Size?

That is a great question. It’s one many (most?) guys ask at some point.

According to experts, supplements, ointments, creams, etc. don’t work. In fact, they potentially could have negative side effects and consequences to your general health. Stretching can help a little, but should be done with a physician with expertise in this area to avoid injury. 

Surgery can be effective but is rarely warranted.

What can help?

Diet.

It turns out overweight men appear to have smaller penises than normal-weight men because part of the shaft is hidden by fat.

If you’re overweight, consider all the health benefits of a healthy diet and getting physical activity. Having more of your penis showing may seem like a big deal (pun intended), but it’s just one of many outcomes of having a normal weight – all positive. Well worth the effort.

Bottom Line on Penis Size

If you are reading this because you are concerned about your penis size during puberty, it’s likely because you have one of two concerns – what the other guys in the locker room think or your ability to have a meaningful sex life.

Here’s the secret – people are more concerned with how you treat them than your size. If you genuinely make another person feel special (not a manipulation of their feelings with flattery), your love life will be fine. Concentrate on becoming the kind of person whom others want to be around — interested in them, kind, funny without drawing attention to yourself, empathic, and considerate. It will be these qualities, rather than a measurement of a certain body part, that will lead to fulfilling relationships with others. 

If what you’re interested in is a lifetime of happiness, then forget about current peer pressure and become the kind of person another person wants to be with — even if it doesn’t make you the boss of the locker room now.

Comments

We are taking an unprecedented path on this subject. If you want to ask about your penis size, go to DrGreene.AI and submit your question. This is an artificial intelligence bot that will read your question and respond. Likely it will just synthesize the information above to provide you with a brief answer that addresses your specific concerns. Please keep in mind, ift’s in Beta.

One More Thought on Penis Size During Puberty

It’s really normal to have questions about what’s happening to your body during this time of massive change. Keep searching for answers. Keep reading. And seriously, don’t freak out. Be open with your doctor about your concerns, and know you are not the only teenager asking these questions!

References

Wood CL, Lane LC, Cheetham T. Puberty: Normal physiology (brief overview). Best Pract Res Clin Endocrinol Metab. 2019 Jun;33(3):101265.