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Large, peer-reviewed meta-analyses and systematic reviews report mean adult erect penis length in the narrow range of about 12.9–13.9 cm (≈5.1–5.5 in) with pooled standard deviations typically around ...
Reputable, clinician‑measured meta‑analyses and systematic reviews find the average erect adult penis length in the United States and worldwide to be roughly 5.1–5.6 inches (≈13–14.5 cm) and conclude ...
A circumference (girth) of 12.7 cm is larger than the most commonly cited clinical average for erect penile circumference—11.66 cm—so it can be described as above average compared with widely‑used poo...
The best large-scale clinician‑measured synthesis (Veale et al., 2015) reports an average erect circumference (girth) of about 11.66 cm (4.59 in), and a later body of work confirms similar global nomo...