What Is The Average Penis Size

penis lengths


When it comes to male body parts, the one that’s often discussed the most is the penis. It is the source of curiosity for many. A lot of men and women wonder about the typical penis size. This article will cover all aspects of penis size, looking at what the averages actually are, factors that can influence size, and how you can measure yours.

What Is The Average Penis Size

The average penis size is around 5.59 inches (14.2 cm) when erect and 3.61 inches (9.2 cm) when flaccid. While the sizes vary, the average flaccid circumference (the distance around the shaft while limps) is 3.66 inches (9.3 cm).

To put the size into perspective, here is a list of how the sizes would compare to other everyday objects:

The average penis is about the size of a computer mouse
It is about the same size as a banana
It is about the same length as an iPhone
The average penis is comparable to a Taylor guitar pick
Factors That Can Influence Penis Size

Historically, there have been many theories as to what determines penis size. For example, some theorists argue that it is a man’s height that is linked to his penis size, while others suggest it could be the length of his forearm.

However, there are a few factors that are recognised to influence penis size. These include:

Genetics: Research has shown that penis size is linked to genetics, with 85% of the variation attributable to genetic factors.
Age: The size of a penis will vary as a man ages. From birth to 18 years of age, penis size will generally increase and for those aged 19 to 25, it will tend to stop growing and stabilize.
Weight: Those with higher body mass index (BMI) are more likely to have a larger penis, so those who are overweight tend to have bigger penises.
How To Measure A Penis

When measuring a penis, the key indicators that need to be looked at are length and girth.

To measure the length of a penis, follows these steps:

Use a ruler to measure it from the tip to the base of the penis.
Make sure the penis is placed against the ruler when measuring.
Keep the ruler parallel to the penis while measuring, it’s important to make sure you get the correct length.
To measure the girth of a penis:

Take a tape measure, and measure around the penis in a circle.
Make sure the circumference is measured in a complete circle.
Ensure the tape measure is kept tight against the skin.
What Is A Small Penis

The medical definition for a small penis is any penis measuring 2.5 standard deviations below the average size. This would mean that the measurement of a small penis would be 3 inches (7.5cm) when erect and 1.5 inches (3.75cm) when flaccid.

Can Penis Size Be Changed

There are several procedures available to increase penis size. These include fat injections, filler injections, and surgeries. However, it is not recommended to have these treatments as the potential side effects are not known.


It is normal to worry about the size of a penis. When it comes down to it, penis size is just a number and it doesn’t influence how attractive someone is. It is important to remember that the average size is widely used as a benchmark, but if someone’s measurements do not fit into the ‘average’ category, that doesn’t mean they are abnormal. Everyone is unique when it comes to penis size and the most important factor is to know the correct way to measure the size for comparison purposes.

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