Average Penis Girth: The Percentile Chart and Where Yours Falls

Medically reviewed by Dr. Elliot Heller, MD | 10,000+ male enhancement procedures | Last Updated: September 2026

Average erect penis girth (circumference) is 4.59 inches (11.66 cm), based on the Veale et al. 2015 BJU International systematic review of up to 15,521 men measured clinically. Most men fall between roughly 4.3 and 4.9 inches. If your erect girth is 4.6 inches you are right at the median; 5.0 inches puts you near the 83rd percentile, and 5.5 inches is above the 98th. The chart below shows exactly where any measurement lands.

Where Your Girth Falls: The Erect Girth Percentile Chart

Find your erect girth (circumference around the thickest part of the shaft) in the left column and read the percentile beside it. A percentile tells you the share of men who measure at or below your size. These bands are modeled from the Veale 2015 clinical mean (4.59 in / 11.66 cm) and standard deviation using a standard normal distribution, the same method the published nomograms use.

Erect girth	Metric	Percentile	How it compares
3.50 in	8.9 cm	~1st	Well below average
3.75 in	9.5 cm	~3rd	Below average
4.00 in	10.2 cm	~9th	Below average
4.25 in	10.8 cm	~22nd	Low-average
4.50 in	11.4 cm	~42nd	Average
4.59 in	11.7 cm	50th (median)	Exactly average
4.75 in	12.1 cm	~64th	Above average
5.00 in	12.7 cm	~83rd	Above average
5.25 in	13.3 cm	~94th	Well above average
5.50 in	14.0 cm	~98th	Top 2%
5.75 in	14.6 cm	~99th+	Top 1%
6.00 in	15.2 cm	>99.9th	Rare

If your measurement sits between two rows, your percentile sits between the two listed values. Anything at or above the 50th percentile (4.59 in) is statistically average or larger. The great majority of men who worry about girth measure inside the normal range; self-measurement anxiety is far more common than an actual below-average result.

Quick Percentile Answers for the Most-Searched Girth Numbers

• 5.0 inch girth: roughly the 83rd percentile. Above average.
• 5.5 inch girth: roughly the 98th percentile. In the top 2 percent.
• 4.5 inch girth: roughly the 42nd percentile. Squarely average.
• 4.0 inch girth: roughly the 9th percentile. Below average but not rare.
• 6.0 inch girth: above the 99.9th percentile. Very uncommon.

Average Penis Length Percentiles, for Comparison

Girth and length are separate measurements and do not track together. Average erect length is 5.17 inches (13.12 cm) in the same Veale 2015 review. These length bands use the same normal-distribution method.

Erect length	Metric	Percentile
4.1 in	10.4 cm	~5th
4.7 in	12.0 cm	~25th
5.17 in	13.1 cm	50th (median)
5.6 in	14.2 cm	~75th
6.25 in	15.9 cm	~95th

Self-reported surveys run about 0.5 to 1.0 inch larger than clinically measured studies, which is why online numbers often look inflated. The Veale figures are clinician-measured, so they are the honest baseline.

How to Measure Your Girth Correctly

Girth is the circumference around the shaft, not a diameter and not a number you divide by 3.14.

1. Achieve a full erection. Girth changes with erection quality, so measure when fully rigid.
2. Wrap a flexible cloth or paper tape around the thickest part of the mid-shaft once.
3. Mark where the tape overlaps and read the circumference in inches or centimeters.
4. Measure two or three times and use the average. Mid-shaft is the standard point because it reflects the typical width during sex; base and tip can read slightly different.

For length, the clinical standard is stretched flaccid length measured from the pubic bone (press the ruler into the fat pad until it meets firm bone) to the tip, because it correlates closely with erect length and is more reproducible than an erect reading.

Does Girth or Length Matter More to Partners?

Survey research on partner preference tends to rate girth as at least as important as length for physical sensation. In one widely cited survey, Eisenman (2001) found most women rated girth above length. The effect is not dramatic, and preferred sizes sit only slightly above average: in a 3D-model study, Prause et al. (2015) found women selected an average circumference only a little above the population mean, which means men in the normal anatomic range already fall inside preferred ranges. The practical takeaway for men considering enhancement: if the goal is perceived sexual satisfaction, added girth tends to deliver more felt impact per dollar than added length.

Is Penis Girth Genetic?

Size, including girth, is shaped mostly by genetics and prenatal hormone exposure, the same factors that set height and build. There is no evidence that pills, pumps, or exercises permanently change adult girth. Non-genetic factors that change apparent girth are limited: a full erection reads larger than a partial one, and significant weight gain around the pubic area can make the base look smaller. Real, lasting girth change in adults comes only from medical procedures.

How Girth Is Increased: The Real Options

For men whose measurement or self-perception drives them to want more, several procedures can add girth. Here are the real options.

Hyaluronic Acid Dermal Filler (Non-Surgical Girth)

HA dermal filler is the most common non-surgical girth procedure. Hyaluronic acid is injected under the skin of the shaft to add circumference in a single 30 to 45 minute office session, with visible girth right away. Most patients gain up to about 1 inch of girth in a single session. Dr. Heller reviews exactly how long the results last, and the full cost, during the confidential consultation before any decision is made.

Fat Transfer (Permanent Girth From Your Own Tissue)

Fat transfer harvests fat from the abdomen or flanks, processes it, and injects it into the shaft. Roughly 60 to 70 percent of transferred fat survives long term, so the gain is permanent but more measured than a single filler session. Sexual activity can be resumed after roughly 4 to 6 weeks.

Silicone Sleeve Implant (Permanent Length and Girth)

A silicone sleeve implant is placed under the skin of the shaft and adds both length and girth permanently in one procedure. Sexual activity can be resumed after roughly 6 weeks. Removal is its own separate surgery.

For men focused on length rather than girth, suspensory ligament release can add visible length by letting more of the internal shaft extend forward. For a broader look at the factors behind size, see the factors that affect penis size guide.

Frequently Asked Questions

What is the average penis girth?

Average erect penis girth (circumference) is 4.59 inches (11.66 cm), per the Veale et al. 2015 BJU International systematic review of up to 15,521 men measured clinically. Most men measure between about 4.3 and 4.9 inches. Girth is the distance around the thickest part of the erect shaft, measured with a flexible tape.

Where does my girth fall on the percentile chart?

A 4.59 inch erect girth is the 50th percentile (exactly average). Around 4.5 inches is the 42nd percentile, 5.0 inches is roughly the 83rd, and 5.5 inches is roughly the 98th. Below 4.0 inches falls under the 10th percentile. Any measurement at or above 4.59 inches is statistically average or larger.

Is 5.5 inch girth big?

Yes. An erect girth of 5.5 inches is around the 98th percentile, meaning larger than roughly 98 percent of men. It is well above the 4.59 inch average.

Is 5 inch girth above average?

Yes. A 5.0 inch erect girth is around the 83rd percentile, comfortably above the 4.59 inch median.

Does girth or length matter more to partners?

Survey research such as Eisenman (2001) rates girth as more important than length for physical sensation for most women surveyed, though the difference is modest and men in the normal range fall inside preferred ranges. Overall sexual function and connection predict satisfaction more strongly than raw size.

How do I measure my girth?

Get a full erection, wrap a flexible cloth or paper tape once around the thickest part of the mid-shaft, mark the overlap, and read the circumference. Measure a few times and average. Do not divide the number by anything; girth is the circumference itself.

Can girth be increased without surgery?

Yes. Hyaluronic acid dermal filler adds up to about 1 inch of girth in a single office session with immediate results. Fat transfer and silicone sleeve implants add girth surgically and permanently.

Talk Through Your Numbers With Dr. Heller in NY or NJ

If your measurement or your own perception has you considering added girth, a confidential consultation is the place to see the real options, the honest expected gain, and the full cost before you decide anything. Dr. Elliot Heller, MD, performs every procedure personally at offices in Manhattan, Staten Island, and Edison, NJ. Call 866-477-2023 or use the contact page to schedule.

Disclaimer: This information is provided for educational purposes and is not a substitute for professional medical advice, diagnosis, or treatment. Please schedule a consultation with our team to discuss your individual needs. Individual results vary.

Sources

• Veale D, et al. “Am I normal? A systematic review and construction of nomograms for flaccid and erect penis length and circumference in up to 15,521 men.” BJU International, 2015. pubmed.ncbi.nlm.nih.gov/25487360
• Eisenman R. “Penis size: Survey of female perceptions of sexual satisfaction.” BMC Women’s Health, 2001. pmc.ncbi.nlm.nih.gov/articles/PMC33342
• Prause N, Park J, Leung S, Miller G. “Women’s Preferences for Penis Size: A New Research Method Using Selection among 3D Models.” PLoS ONE, 2015. pubmed.ncbi.nlm.nih.gov/26332467
• Cleveland Clinic. “Penis Enlargement Surgery.” my.clevelandclinic.org
• Medical News Today. “Is penis size genetic?” medicalnewstoday.com