Jan 6, 2026
How do self‑reported penis sizes compare to clinician‑measured data across large samples and what biases explain discrepancies?
Large, clinician‑measured series and meta‑analyses converge on an average erect penile length of roughly 12.9–13.9 cm (about 5.1–5.5 in), while self‑reported and internet survey studies routinely retu...