My length is small

  • Human penises vary in size on a number of measures, including length and circumference when flaccid and erect.
  • Besides the natural variability of human penises in general, there are factors that lead to minor variations in a particular male, such as the level of arousal, time of day, room temperature, anxiety level, sport activity and frequency of sexual activity. 

Average penis sizes around the world

  • Average length when flaccid was from 7 to 10 centimetres (2.8 to 3.9 inches).
  • Flaccid circumference/girth was between 9 to 10 centimetres (3.5 to 3.9 inches) when flaccid.
  • When Erect the average length ranged from 12 to 16 centimetres (4.7 to 6.3 inches).
  • When erect the circumference was around 12 centimetres (4.7 inches).
  • Only men with a flaccid length of less than 4 centimetres (1.6 inches), or a stretched or erect length of less than 7.5 centimetres (3 inches) should be considered candidates for penile lengthening.


  • Micropenis is a medical term for a small but normally structured penis. 
  • Hormonal or genetic factors can cause this condition. Healthcare providers often note the condition during the newborn to early childhood period.
  • As long as no other health concerns are present, a micropenis can function normally. 
  • People with micropenis are still able to urinate (pee) and have erections.
  • Androgens like testosterone are responsible for penis enlargement and elongation during puberty.

What are the symptoms of a micropenis?

  • The most common micropenis symptom in babies is a penis that measures less than 0.75 inches when gently stretched. In adults, a penis that measures 3.67 inches or less when gently stretched is a micropenis.

What causes a micropenis?

  • Micropenis is usually caused by fetal testosterone deficiency, which can be the result of a variety of conditions, including Prader-Willi syndrome, Kallman syndrome or, most commonly, hypogonadotropic hypogonadism.
  • Hypogonadotropic hypogonadism occurs when your hypothalamus  doesn’t secrete the hormones that stimulate your testicles to produce testosterone. This process is necessary for normal maturation and reproductive function.

How is a micropenis diagnosed?

  • Your healthcare provider can diagnose micropenis with a physical examination. 
  • They’ll gently stretch your penis and measure it.
  • The number is then compared to the size range of your particular age group.

How is a micropenis treated?

  • The most common micropenis treatments include testosterone therapy and surgery.
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