Penis Size and Development: Common Concerns for Teens - Urology

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Penile length


Hello doctor, I just turned 15 years old, but my bone age is already 16.
However, my penis is still only a little over 12 centimeters.
My classmates say they are 15 or 16 centimeters.
Am I too small? Will I grow longer? Also, when I am not erect, my foreskin covers the glans, but it does not when I am erect.
Does this count as phimosis? Will it affect my development? Additionally, there is an issue with hardness; when I masturbate, if my penis is not tensed, it feels like the hardness is between a peeled banana and a cucumber.
It only reaches cucumber hardness when I tense it.
Is this normal?

Guózhōngshēng, 10~19 year old female. Ask Date: 2023/02/07

Dr. Du Shixi reply Urology


Hello: Everyone is different, so there's no need to worry.
As for the situation you mentioned, it seems to be phimosis.
However, if you maintain proper hygiene, treatment may not be necessary.
Regarding hardness, it varies from person to person; just pay attention to your overall health, including exercise.
Wishing you good health.

Reply Date: 2023/02/07

More Info


Understanding penis size and development during adolescence can be a source of concern for many teenagers. It's important to remember that there is a wide range of what is considered "normal" when it comes to penis size and development.
At the age of 15, it is common for boys to experience a variety of developmental stages. The average erect penis size for adult males is typically reported to be between 12 to 16 cm (approximately 4.7 to 6.3 inches), but this can vary significantly. If your penis measures around 12 cm when erect, it is within the lower range of average sizes. However, it is essential to understand that growth can continue into your late teens, and many boys experience growth spurts in their penis size after the age of 15. Factors such as genetics, hormonal levels, and overall health can influence this growth.
Regarding your question about the foreskin, it is normal for the foreskin to cover the glans (the head of the penis) when flaccid and to retract during an erection. This does not necessarily indicate phimosis (a condition where the foreskin cannot be retracted). Phimosis is typically characterized by an inability to retract the foreskin at all, which can lead to discomfort or complications. If you can retract your foreskin without pain, it is likely not a concern.
As for the hardness of your erection, it is also common for teenagers to experience variations in erectile firmness. The penis may not always feel as hard as it could, especially if you are not fully aroused or if you are feeling anxious or distracted. The comparison you made to a banana versus a cucumber is a way to express the difference in firmness, and it is important to note that erections can vary in firmness based on many factors, including emotional state, physical stimulation, and overall health. If you find that you consistently have difficulty achieving a firm erection, it may be worth discussing with a healthcare professional.

In terms of development, it is normal for boys to have concerns about their growth and changes during puberty. The timing of these changes can vary widely among individuals. Some boys may develop body hair and experience voice changes earlier than others, while some may take longer to show these signs of puberty. If you are concerned about your development, it may be beneficial to consult with a healthcare provider who can assess your growth and development in the context of your overall health.

Lastly, it is crucial to maintain a healthy lifestyle during this period of growth. Regular exercise, a balanced diet, and adequate sleep can all contribute positively to your physical development and overall well-being. If you have ongoing concerns about your development, penis size, or any other related issues, do not hesitate to reach out to a healthcare professional for personalized advice and support. Remember, you are not alone in these concerns, and many boys experience similar feelings during their teenage years.

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