Penis Size

How can I tell if my baby’s penis is the normal size for his age?

Penis Size

Dr. Greene’s Answer:

In determining size, the “stretched penile length” is far more important than the “relaxed length.” To evaluate 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. Here are the normal values:

Average Stretched Penile Length 
(Adapted from Feldman KW, Smith DW. Journal of Pediatrics. 1975; 86:395):

Age
Normal: Mean +/- 1 SD (inches)
Abnormal: Mean – 2.5 SD (inches)
0-5 months
1.5 +/- 0.3
0.75
6-12 months
1.7 +/- 0.3
0.9
1-2 years
1.9 +/- 0.3
1.0
2-3 years
2.0 +/- 0.4
1.1
3-4 years
2.2 +/- 0.4
1.3
4-5 years
2.2 +/- 0.4
1.4
5-8 years
2.4 +/- 0.4
1.5
8-11 years
2.5 +/- 0.4
1.5
Adult
5.2 +/- 0.6
3.7

 

Dr. Alan Greene

Dr. Greene is the founder of DrGreene.com (cited by the AMA as “the pioneer physician Web site”), a practicing pediatrician, father of four, & author of Raising Baby Green & Feeding Baby Green. He appears frequently in the media including such venues as the The New York Times, the TODAY Show, Good Morning America, & the Dr. Oz Show.

  1. Clifton

    I’m 11 and my penas erected is 2.5 inches is this ok

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  2. (Private)

    I feel uncomfortable talking about this but I am 10 and a half. My parents tell me it is totally OK to talk about this topic because it is going to be very relevant very soon. They are 100 percent ok with me asking questions. Anyway,

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  3. Tom

    My penis is 5 inchis I’m 11

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  4. Unknown

    I’m 12, my penis is 3.5 erect. Is this normal

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  5. Jack Dane

    Hi

    I have a urgent question . Please help me . I was born in 1993 Sep and now I’m 22 years old . My penis size is around 1.5″ Flaccid (non erect) and 5.5″ (erect) . I think my flaccid size is very very abnormal and really it looks like a very young boy’s penis whereas my brothers size and form is very different and actually they have normal size. I remember that since I was 12 years old until now my penis size and form not change in flaccid shape. What is the main reason? Is there a treatment ? Oh I should tell you since childhood I like to put a pillow or something like it between my legs so that it press my penis and testicle and this was very pleasant for me during sleep and rest. I think doing this about 10 years prevents enlargement of my penis. Is it related to my problem or not?

    Thanks a lot …

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  6. anonymous

    I’m 11 with 3 and a half size penis ercect is this normal?

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  7. DubbyDolphin

    My penis is 3.2 inches long, and I’m a 10 year old who hasn’t reached puberty. Yet…… So, is it bigger, smaller, or the right size for my age?

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    • (Private)

      I am the same age, and used the chart, I am 0.5 above average all time so that’s bigger.

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  8. CANT Tell

    im 12 and my penis is 2.3 inches when hard. Is that ok for my age?

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  9. Brett

    It is disturbing that any type of professional would allow a space to perpetuate male’s fears of not having a “big enough” penis. How is this helpful to our sons? This should be deleted.

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    • Hi Brett,

      Thank you so much for your comment. You raise an interesting and complex question. I must admit, we’ve been struggling to find the right balance. Here is the background —

      When Dr. Greene wrote this answer he was addressing the parent of a baby who was concerned about a medical condition. As a pediatrician, this is a question he gets routinely and a valid one. Recently we started getting comments from a lot of adolescent boys asking about their own penis size. We moderate all comments and have guidelines, for instance we don’t post hateful comments, comments that call other people names, spam, or anything pornographic. We do allow differences of opinion and respect multiple points of view. Where do these new questions fall within our guidelines?

      Our first thought was we needed to update our chart on penis size so these boys could just look on the chart and have their answer. You may have noticed that the chart skips from 11 years-old to adult without data. Interestingly when Dr. Greene did the research to find the answers he found there was no trusted data on normal penis size in adolescent boys. That meant we couldn’t just add to the chart.

      What we have done in the short run was to carefully read each comment and try to decide the intent of the boy writing in. Was this a joke? Was it pornographic? Was it an honest concern? Did it make fun of anyone else? We aren’t perfect (that is certain), but based on these reasons, we do not publish many of the comments made on this post.

      So why would we publish them at all? By the time kids reach puberty most have been exposed to photos, typically online or in the media, that show the human body in unrealistic proportions. Typically these photos are sexual in nature, but not always. It is our hopes that in the absence of scientific data, by allowing adolescent boys to post their honest question about the body part they feel most insecure, they will see that they are not abnormal. We know the sizes they post can not be trusted due to differences in measurement techniques and the human tendency to make ourselves appear better in other’s eyes.

      We would love your feedback. After you hear our reasoning, do you still think we should delete all these comments?

      Thanks again for voicing your concern.

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  10. John

    My penis penis is 5 1/2 inches when hard and I’m only 12. I believe my penis will grow a few more inches over the years and I can satisfy a girl. But still again is this little for a 12 year cause all my friends are 13 and their penises are 6 and bigger

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  11. max

    Hi I’m 11 turning 12 and I have a 5 inch erect. I think it is too smaller than others.

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  12. coleman "wiggles"

    I’m 13 almost 14 and my penis is 3in soft and a little over 6in erect is this 2 big or 2 small

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  13. jport

    I’m 14 and a half my penis is about 2.5 inches when soft and about 3.5 when hard. Is this normal for my age?

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  14. josh

    Hi I think my penis is smaller than average. My erection is 6.5cm long and 3cm long normal. I am turning 12 in a bit. Is this alright?

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  15. Anonymous

    I’m 12 soon 13 and 3.5 inches erect and just hit puberty recently. Is this average???

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  16. Eric Evans

    My son is 13 years old and his penis size is 5cm. Is this normal or abnormal? If abnormal, what could be the cause of this abnormality? He is very nervous about this and is asking a lot of questions.

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  17. Jake O'Kelly

    How do I make my penis longer

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  18. Sam

    I’m turning 12 and my penis is about 4.5 inches erect. Is this normal???

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    • Danika

      Yes, yes, of course. That’s very natural. And remember that no matter what your friends or other kids at school say, penis size does not have anything to do with your worth. It’s not a bad thing to be below average, or above average. Penises (and vaginas) come in many different shapes, colors, and sizes, but if you’re experiencing pain or abnormally strong, stinky smells coming from that area (it’s natural for it to smell not-so-great sometimes, though. Just make sure to clean yourself regularly), please, please, please know that going through the embarrassment of letting your parent(s) or guardian(s) know about your issue will be so much easier than dealing with what could potentially end up as a life-long issue that could cause problems with self esteem and relationships and/or result in continuous pain.

      But seriously, I know for absolute sure that penis size does not tie into your value or worth. It’s completely okay to look different from other guys in pictures or videos, because they were specifically selected because they match what we, today, think of as having the ideal penis. Believe me this, though. M a n y, if not most, penises (and testicles – some hang lower than others. Some are larger or smaller than others) look very different from those that are currently put in pictures and videos, and as long as you are healthy, there is nothing bad about the way that your penis (and the rest of your body) looks.

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      • Thank you for this wise reply. It’s a great reminder to us that models are not “normal”. I love this video, especially the end. It shows how the media distorts our views of real people and real bodies.

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  19. Anonymous

    I am 12 turning 13 in august my penis siize is 5 inches while erect is this normal I feel like it is too big.

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    • Thorpyworpy

      I’m not sure if you measured your penis correctly as many of you young kids in this forum state lengths that I can’t even achieve and I’m in the upper area of my age group. I’m mid 14 and I’m 4.8 inches. I have done the research.

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      • James charleston

        im 12 and from base to tip mine is 14cm is this bad

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    • DubbyDolphin

      It is actually normal, well, for a 12-13 year old.

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  20. Anonoymus

    Hi I’m 11 turning 12 in 2 months and my erect penis is 3 1/2 inches, sometimes 3 3/4, is this normal?

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  21. dj

    Wassup I am 11 years old and my penis is 6 1/2 inches Is this size too big for my age ?

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  22. anand

    I’m 22 year old my penis size is 5 inch and 1 1/2 inch thick after stretched. Is there anything we can do so it comes in normal size?

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  23. Bob provost

    Why do you guys care about how long your sons penises are?

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  24. Anonymous User

    I am 13 and my penis size is 5.3 inches I do not know if this is a avreage size could you please help me?

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    • James charleston

      Don’t worry I’m 12 turning 13 in 4 months and mine is 5.5-5,7 inches and when I hear my mates there like mine is 6 inches as a joke and I’m like mine is nearly that size and im scared so ur average

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  25. Maciej

    Hi I am 11 years old and my fully erected penis size is 8.26cm

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    • Jackson Fleming

      I’m 11 my pebis is almost 4 inches is this normal? Ps I don’t think I have started puberty yet.

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  26. Ricks Ali

    I am 13 years old and my penis is 5″. In the showers every one seems to have a bigger penis. Is my lenth normal?

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    • Spencer

      Yes that’s sound really big I’m 10 and mine is 3 inches

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  27. Anonymous

    Hi doc,

    Im turning 14 soon and usually my penis is 4.4 soft and 6.5 hard, but the most it has been is 6.8. Is it normal? (Considering i started puberty from age 10 and it has been growing ever since).

    Thanks :)

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  28. Mario

    Im 14 years old and my pennis size is: But i have seen friend’s pennis and its 8-9cm (soft).. My pennis is normal or?
    * 5-6 cm(soft)
    *12.5 – 13 cm (erect)
    * 8cm (after ejaculation) …

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  29. Anonymous

    Im 11 and my erect penis is 11 cm long, is this norml?

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    • Mario

      Yes, im 14 years old and pennis size is 13cm erected!

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    • J_Martin

      This can the question because it changes are you about to turn 12 or did you just turn 11?

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      • Anonymous

        I turned 11 on february 2015

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  30. Name

    I’m 12 and I have about a 8.89 cm erect penis. Is this normal?

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    • Anonymous User

      I’am 13 and my penis size is 5.4 inches when erect is this small or is this average size?

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    • gg

      ya think that is avreage

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  31. mike

    I’m 14 and my penis size is 4 1/2 inches. I would like to know of that’s normal.

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    • J

      I dont think it is very good to have a 4 1/2 in penis when your 14 im 12 and mine is 5 in long not to brag

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      • Richi

        I am 14 (just turned) and my penis is 19.6 cm long erected and 15 cm thick is that too big or too small?

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        • Thorpyworpy

          You people are all lying. I don’t think that you guys know how to correctly measure your penis. I am turning 15 in October 2015 and I’m 4.8 inches. I have done the research. I am in the above average for my age group. So 4.5 inches is fine Mike.

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      • Amber

        There’s a large range of what is “normal” for penis size. They grow at different rates for different people. Plus, I’m a woman telling you that penis size doesn’t really matter to most women, and who knows better than a woman?

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  32. Eric

    My son is 1 week old his penis is already 1 whole inch the doctor said is real big for his age what does this mean?

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  33. Ralph Jenson

    My penis is 2.5″ soft 4″ hard and I’m 10 years old
    Is that below average above average or normal

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    • Alexander

      You are a lucky boy. The average size of a ten year olds erect penis is right around 2 inches.

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      • MadMan

        My penis size is 3.3 inches. so is it normal?

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  34. Matthew

    I am 12 years old going to turn 13 and my penis is very small like a 5 year olds pls help me

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    • jack

      Don’t worry. I’m the same age and mine is small too. Girls don’t usually care that much about it as much as it might seem they do. We’ll be fine, not everyone is perfect.

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    • omkar

      my age is 19+ my penis is 13cm , it is small or big ?? is that below the average or above the average or normal??

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      • Thorpyworpy

        Not be mean… See a doctor now!

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    • Steve

      I’m 12 and I’m at about 8.2 cm long is that short or average or small??

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  35. Jack

    You’re very lucky I’m 14
    And my penis is only 9.5 cm
    Erect so your penis is more than double mine

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  36. michelle ebejer

    I have a 6 month boy and his penis opening is still closed in his skin. There is a tiny hole and it’s not in the centre. Is this normal?

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  37. John

    I’m 12 my penis is 3 inches soft and about 4 inches hard is this normal, below average , or above average?

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    • Sam

      I would say average because mine is the same

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  38. ss

    My son is 5.3 years old, his weight is 17 kg, but his penis size is 1.5cm after stretched. Is there anything we can do so it comes in normal size? As I also feel shy to talk about it to doctors.

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  39. Ellen Ledesma

    Hello, when measuring my son’s penis should I go by the stretched or the erect measurement? It appears that the erect measurement is about half an inch longer than the stretched measurement.

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  40. Joh

    My 11 y/o son has an 8cm penis. Is this normal

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  41. ann

    Hi doc.

    My son is turning 4y/o this coming May. His penis size is about 3.75-4cm. Is this normal?
    Many thanks.

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  42. Glen

    Hi Dr,

    My sons is turning 3 in a couple of months. His penus is about 2 centimetres long. Is this normal?
    He has been circumcised.

    Thanks.

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    • farrukh

      Hi Dr.

      How are you? My son is 5.5 years old. His penis is very small. Please help me. What dight is good for him?

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  43. KLEE

    My son just turned 2 years old and his penis is 3 CM is this normal? When he was born a urologist questioned if he had micropenis the endocrinologist didn’t say, just that he was smaller than average.

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    • RWIL

      Is that 3cm stretched?

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  44. maulik

    my son is 5 year old ,his penis size is 20 cm, pls suggest it is normal or not

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    • Gary Lloyd

      I seriously doubt that your 5 year old son is 20 cm… did u pull his skin forward instead of back to measure? less than 7 cm would be about average.. 20 cm is very unlikely

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      • Thorpyworpy

        I agree

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  45. JONATHAN MIHALY

    Just kidding man, you’re fine! Bigger than I was at your age :)

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