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What Is Considered a Thin Penis?
If you've ever thought about how your penis compares in size to others in terms of thickness, you're not alone. Most men want to know how their penis compares to the average person.
Last Updated: 04/11/2025

If you've ever wondered how your penis compares to others in terms of thickness, you're not alone. Many men want to know how their penis compares to the average. Unfortunately, common curiosity may occasionally lead to fixation and worry regarding penis size. This can become an unhealthy and often unneeded preoccupation, mainly because most men who believe their penises are too little have perfectly normal-sized penises.
What Is The Average Girth Size For Males?
What are the typical sizes of guys' penises? Here are some significant findings from research conducted throughout the world, according to Medical News Today:
Research shows up to 45 percent of men feel they have a tiny penis.
When flaccid, the average length was 7 to 10 cm (2.8 to 3.9 inches).
When flaccid, circumference/girth was between 9 and 10 cm (3.5 and 3.9 inches).
The average penis length when standing was between 12 and 16 cm (4.7 to 6.3 inches).
The average circumference was around 12 cm with an erection (4.7 inches).
What Is a "Normal" or Average Girth Size for Males
It's not nearly the size many people believe!
According to the British Journal of Urology International, a flaccid penis has a thickness of 9.31 cm (3.66 inches) and while erect 11.66 cm (4.59 inches). When volunteer bias is taken into account, the researchers feel that the average falls closer to the lower end of that range.
According to an older study, the average flaccid length is 3.61 inches.
Why Is My Penis Skinny?
What is considered too small? What is too large? According to research, many men want a bigger penis, regardless of whether they believe their penis size is typical or not. Furthermore, some men assume they have a small penis when it is within the normal range.
However, another question men ask is whether their penis is too skinny. They're sometimes not confident that it's thick enough.
Micropenis
A micropenis is usually detected before birth. Inconsistent hormone levels throughout the third trimester of pregnancy might cause the disease.
When erect, an adult penis is unusually tiny if it is less than three inches (approximately eight cm) long. Doctors have no assessment for thickness and a micropenis diagnosis.
Body Weight
Peer-reviewed studies tell us that excess body weight can cause substantial penis shrinkage. While weight has little effect on thickness, it can change perceptions about whether or not you are too thick or too thin. The fat buildup will cause penis shrinkage.
In addition, increased fat can also lead to a change in shape and even reduce overall health, penetration ability, and sexual performance.
Losing body weight can answer many of your size concerns. For every 30-50 pounds lost, men might increase 1 inch in penile length. However, if you are already thin, you will see little results.
Age and Erectile Dysfunction
Men generate less testosterone as they age, leading to a decrease in libido and penis size. Aging also causes fatty deposits to accumulate in the arteries, decreasing blood flow to the penis, limiting girth. As a result, the muscle cells in the erectile tubes of the penis weaken.
Blood flow
A man may be unable to obtain, retain, or get hard enough for penetration if insufficient blood flows to and remains in the organ during sexual activity. All of these difficulties may be addressed if blood vessel supply is improved. Lack of blood flow can prevent a penis from reaching its intended thickness.
Underlying Conditions
Peyronie's disease can cause erections to curve to the right or left side, changing the shape of the penis and possibly making it appear thinner. If you have Peyronie's disease, talk to your doctor about whether it could affect the size of your penis.
Prostate cancer treatment, such as surgery or testosterone deprivation therapy, can also make the penis shrink. Prostate cancer patients often report a reduced length after their treatment.
Lack of Sex
If you're no longer having erections, especially if you haven't been having them for years, the skin and penile tissues can stiffen and have less flexibility, especially if you're in your 70s, 80s, and beyond. If this happens, the penis can shorten or look thinner.
How to Measure a Penis
Measuring a penis can be helpful for more than one reason. Knowing proper girth and length can help select the appropriate size condom, for example. To properly measure, press a measuring tape into the groin and measure from the base of the penis to the tip to determine penile length.
To measure penis thickness, wrap a measuring tape around the widest section of the penis.
How to measure an erect penis' girth
Wrap the thread or tape around the thickest section of the shaft of your penis. Mark where the string joins and measure the string distance using a ruler if you're using string. If you're using a flexible measuring tape, record the measurement when it reaches your penis.
What Penis Size Do Women Want?
According to studies based on 3-d models, here is what women want:
For one-night stands, the average size is 6.4 inches/16.3 cm long, while circumference = 5.0 inches/12.7 cm.
For long-term relationships, females prefer 6.3 inches/16.0 cm long, while circumference = 4.8 inches/12.2 cm.
For overall sexual partners, women preferred a penis with a somewhat greater average circumference and length.
According to these first estimations of erect penis size preferences based on 3D models, women properly recall size and prefer penises that are just a little bigger than average. So according to this research, size matters.
However, many women say it's the overall performance that matters. Females leading a fulfilling sex life usually have had multiple sexual partners over the years and develop more pleasure out of the overall sexual performance, with size as only one factor of sexual activity satisfaction.
In fact, a penis that's really large might even cause pain upon penetration. This problem can be relieved by using lots of lube.
What about Gay Men?
According to The Gay Men's Health Project's studies, anxiety and concerns about penis size influence the sex gay men have and can prevent a fulfilling sex life for many men.
Sexual positions such as whether oral sex or anal sex are preferred and even how sexually active a guy is are factors. In a study of 566 homosexual and bisexual males, 38% stated their penis size creates worry, 16% said they'd received negative comments about it, and 22% said they'd rejected sex in the past because of it.
When to Seek Penis Enlargement?
Hormone therapy, a surgical procedure, and other methods can enhance the size of a small penis, and men who think they have a thin penis often seek medical advice to learn more about these options. However, these therapies have risks, and most men do not have a small enough penis to merit such action.
Doctors normally do not prescribe treatment unless a penis has a length of less than 4 cm (1.6 in) or an erect length of less than 7.5 cm (3 in). Physicians seldom recommend surgery to correct thinness alone.
The motive for seeking therapy is often based on self-image, worries of inadequacy, a desire to impress others, and other psychological variables rather than actual sexual health.
Once men seek medical advice and learn the hazards and potential treatment consequences, many abandon the concept of penile enlargement surgery.
Can You Increase Girth Size?
Many popular penis-enlargement treatments have limited results, and some might even cause lasting penile injury or even penis shrinkage! Talk to your doctor to learn more about these popular items and techniques:
Lotions and pills These often include vitamins, minerals, herbs, or hormones that the producer claims will expand the penis. None of these items have been proven effective, and some may even be hazardous.
Vacuum pumps Pumps are occasionally used as a treatment for erectile dysfunction because they suck blood into the penis, causing it to enlarge. A vacuum pump can briefly make a penis appear bigger. However, using one too frequently or for too long might damage elastic tissue in the penis, resulting in less hard erections, and possibly causing penis shrink effects. In addition, the penis enlargement is temporary.
Exercises These exercises, also known as jelqing, involve a hand-over-hand motion to pump blood from the base to the top of the penis. Although this procedure looks safer than other treatments, there is no scientific evidence that it works and it may result in health risks like scarring, discomfort, and deformity.
Stretching Stretching is a penile augmentation process of applying mild stress to the penis via a stretcher or extender device, commonly known as a penile traction device. A few modest studies have found that these devices can increase lengths by half an inch to almost 2 inches (approximately 1 to 3 cm). However, stretching will make you thinner, defeating your performance goal.
To prove safety and efficacy, larger, more rigorous research is required for many of these treatments.
Surgery is dangerous and may not be effective
Studies of existing surgical procedures to extend the penis have yielded mixed safety, efficacy, and patient satisfaction. Considering the treatment costs of surgery, this is not the most optimal option.
Enlargement surgeries, such as the division of the suspensory ligament, may add half an inch (1.25 centimeter) to the look of a flaccid penis but do not affect how long it actually is. In the worst-case scenario, surgery can lead to consequences such as infection, scarring, and loss of feeling or function.
Surgical procedures performed by a physician to increase thickness are not common.
Impact of obesity and age and erectile dysfunction
Obesity
Compared to normal-weight males, penile length development is markedly reduced (by roughly 10%) in obese boys, with concomitantly lower testosterone levels, across pubertal periods. Childhood obesity is a significant predictor of decreased testosterone levels and penis growth. In addition, fat buildup even in adults can lead to the appearance of penis shrinkage. If you are overweight, talk to your doctor about a healthy diet to help stop penis shrinkage.
Age
As men age, they generate less testosterone, leading to a decrease in libido and penis shrinkage. Aging also causes fatty deposits to accumulate in the arteries, decreasing blood flow to the penis. As a result, the muscle cells in the erectile tubes of the penis weaken.
Erectile dysfunction
Compared to individuals with normal erections, severe ED patients refractory to penile injection had smaller penile. The current study stratifies distinct ED ratings in a more homogeneous group of healthy males and found no link between objective penile size and ED diagnosis. However, lack of blood to blood vessels does affect erection size.
There are many causes of erectile dysfunction, including mood, health, diet, alcohol consumption, and hormonal imbalance.
Frequently Asked Questions About Penile Girth and Size
Can masturbation affect penis thickness?
Masturbation has no long-term effect on penis growth, according to scientific studies. It causes an erection that expands a thin penis, although momentary. After ejaculation, you will experience penis shrinkage back to normal size.
Does penis thickness affect orgasm?
That answer is not so straightforward. While the shape and erection firmness can affect orgasm, too much girth can cause pain after penetration.
How is penis thickness diagnosed?
There is no official doctor diagnosis of a thin penis, but other issues can cause a change in thickness, such as Peyronie's disease. Symptoms of Peyronie's disease include causing erections to curve to the right or left side, changing the shape of the penis.
Can sex toys increase penis thickness?
There is no evidence that sex toys can substantially affect penis thickness beyond temporary blood vessels being dilated from increased stimulation during an erection.