1. Average Length (Erect):
- Most studies show that the average length of an erect penis is around 13–14 cm (5.1–5.5 inches).
- A large study published in the British Journal of Urology International (2015) collected data from over 15,000 men and found the average length to be about 13.12 cm.
2. Girth (Erect):
- The average girth (circumference) of an erect penis is about 11.6 cm (4.6 inches).
3. Range of Variation:
- Penis sizes vary widely, ranging from less than 7 cm up to over 20 cm when erect.
- Size is influenced by many factors, but genetics plays the largest role.
4. Normal Distribution:
- Penis sizes follow an approximately normal distribution (bell curve), meaning most men are near the average size, and very large or very small sizes are rare but completely normal.
5. Flaccid Size:
- The size of a flaccid penis is less reliable for predicting erect length because it is strongly affected by temperature, stress, and other factors.
6. Psychological Aspects:
- Many men worry about their size, but research shows that in most cases, size is not a problem for sexual satisfaction for either themselves or their partners.
- Communication and intimacy are often more important than size.