Where does your girth rank in the clinical data?
Enter your erect girth and see exactly where you rank against Veale et al. (2015) — 15,521 men, clinician-measured, no self-reported data included.
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What is the average erect penis girth?
Veale et al. (2015), the largest clinician-measured study in the field, reported a mean erect girth of 11.66 cm (4.59 in), with a standard deviation of 1.10 cm. The sample covered 15,521 men across multiple countries, with all data collected by clinicians — no self-reported measurements were included.
68% of men fall within one standard deviation of the mean — roughly 10.56–12.76 cm (4.16–5.02 in). The distribution is normal (bell-shaped), meaning the vast majority of men cluster close to the average, with true extremes being statistically rare.
How does girth compare to length?
Girth has a smaller standard deviation (1.10 cm) than length (1.66 cm), meaning there is proportionally less variation in girth across the population. In practical terms, the middle 50% of men span about 1.48 cm in girth (25th to 75th percentile: 10.92–12.40 cm, or 4.30–4.88 in) — a tighter range than for length.
Research on partner preferences consistently finds girth is reported as more relevant to sensation than length, though individual preferences vary significantly and no measurement is clinically linked to satisfaction outcomes.
Why clinician-measured data matters
Self-reported girth measurements are even more susceptible to bias than length measurements, since circumference is harder to measure accurately without a flexible tape. Studies that rely on self-reported data consistently produce inflated averages. The Veale et al. study excluded self-reported data entirely — which is why it remains the most credible clinical reference in this area.
Frequently asked questions
Yes. The 50th percentile for erect girth in the Veale et al. data is 4.59 inches (11.66 cm). A girth of 4.5 inches sits around the 43rd percentile — very close to the median. The 25th percentile is 4.30 inches and the 75th is 4.88 inches, meaning the entire middle half of men span just 0.58 inches of girth.
Survey research on partner preferences suggests girth is slightly more frequently cited as impactful on sensation than length, though this varies considerably between individuals and is influenced by anatomy, positioning, and other factors. Clinically, neither measurement is independently linked to sexual satisfaction outcomes — which depend far more on communication, arousal, and emotional connection.
Use a flexible measuring tape (or a piece of string measured against a ruler) around the widest point of the erect shaft. Measure in a consistent location — typically mid-shaft — for comparability with clinical studies. Avoid using a ruler held at a tangent, which consistently underestimates circumference. In the Veale et al. study, clinicians used a tape measure at mid-shaft.
- Veale D et al. (2015). BJU International, 115(6), 978–986
- Wylie KR & Eardley I. (2007). BJU International, 99(6), 1449–1455