When Does the Penis Stop Growing?
Penis Size by Age | When Does a Penis Stop Growing?
Here’s a general medical reference based on developmental studies:
| Age | Average Flaccid Length |
|---|---|
| 10 years | 4–5 cm |
| 12 years | 5–7 cm |
| 14 years | 6–9 cm |
| 16 years | 8–12 cm |
| Adult | 9–13 cm |
These numbers vary widely. Genetics plays the biggest role, so comparisons aren’t helpful.