factually
Index/Topics/Online Surveys

Online Surveys

Online surveys and tools that produce percentile tables for penis size.

Fact-Checks

2 results
Jan 12, 2026
Most Viewed

What is the average flaccid vs erect penis size and how do they correlate?

A preponderance of systematic reviews and large measured studies place the average flaccid penile length around 9–9.5 cm and the average erect length around 13–14 cm, with stretched length clustering ...

Jan 12, 2026
Most Viewed

Which studies report penis size percentiles and sample sizes?

Three types of studies report penis-size percentiles and sample sizes: large systematic reviews and nomogram-building meta-analyses that pool many clinic-measured studies, country-level prospective st...