Most penis enlargement methods sold online have no good evidence behind them. In clinical studies, injectable fillers added about 2 cm of girth that fades over time, traction devices added a little length with months of daily wear, and surgery carried higher risks. Results vary, and no method is risk-free.
Written by Kiara DeWitt, BSN, RN, CPN
Medically reviewed by Dr. Josh Allen, D.O., Medical Director, October 23, 2026
Disclaimer: This article is general education, not medical advice, and individual results vary. Talk with a licensed provider about your own situation before choosing any treatment.
Enlargement can mean three different things, and each method works on only some of them.
| Goal | What it addresses | Methods studied for it |
|---|---|---|
| Length | Visible or measured length | Traction devices, ligament surgery |
| Girth | Circumference of the shaft | Fillers, fat transfer, grafts, implants |
| Glans | Size of the head | Filler, grafts |
For context, a systematic review that pooled measurements from up to 15,521 men found an average erect length of 13.12 cm (about 5.2 inches) and an average erect girth of 11.66 cm (about 4.6 inches). Those averages matter, because many men looking into enlargement already fall inside the normal range.
Enhancement can also be cosmetic, functional, or both. Most men asking about enlargement want a cosmetic change: to look larger and feel more confident. That is a different goal from treating a functional problem such as erectile dysfunction, and the evidence for one does not carry over to the other.
The internet is full of products that promise dramatic enlargement. A 2025 urology review sums it up plainly: lotions, pills, stretching devices, vacuum pumps, and home massage techniques sold online are mostly ineffective.
| Claimed solution | What the evidence shows |
|---|---|
| Enlargement pills and supplements | No evidence they work; contents vary and some include hormones |
| Creams and oils | No evidence for lasting enlargement |
| Jelqing | No research showing it works; rough technique can tear tissue |
| Vacuum pumps | A fuller look for a short time only; no lasting increase |
Cleveland Clinic’s urologist puts pills, gummies, creams, and lotions in the same group: lots of claims, no evidence they work, and the same page notes that a pump does not produce lasting increases in size. For jelqing, most of the support is anecdotal, and squeezing too hard can cause scarring or damage the ligaments that support the penis.
What these products tend to have in common:
Traction devices clip to the penis and apply a steady stretching force for hours at a time, on the idea that slow mechanical stress lets tissue lengthen over months.
The studies are small, but they do show something. In one study of 54 men who wore a traction device 6 hours a day for 4 months, erect length was about 1.2 cm (roughly 0.5 inch) longer at the 6-month check, with no meaningful change in girth. A second, smaller study of 23 men also found length gains without a girth change. The review concludes that traction should not be recommended to men whose only concern is girth.
| Advantages | Drawbacks |
|---|---|
| No surgery or injections | Hours of wear every day for months |
| Some clinical evidence for length | Gains are small |
| Low risk when used as directed | Girth does not change |
| Gains held at a 6-month check in one study | Easy to quit before seeing any change |
Wearing a device longer than directed, or pulling too hard, can injure the penis.
Reality check:
Fillers are the non-surgical girth option with randomized trial data. The filler sits in the layer just under the skin of the shaft. It adds volume; it does not change length or the erectile tissue.
Two randomized trials compared hyaluronic acid (HA) with polylactic acid (PLA) filler. In the first, 74 men received a single injection, and at 24 weeks girth had increased by an average of 2.1 cm with HA and 1.6 cm with PLA, with no serious adverse events. In the second, among the 64 men who completed it, the average gain was about 2.3 cm with HA and 2.0 cm with PLA, again with no serious adverse events. Both trials followed men for only 24 weeks, and results vary.
The gain does not hold steady. In a study that followed 38 men for a year after HA filler, the flaccid girth gain went from about 3.4 cm at one month to about 2.4 cm at 12 months.
The material matters for safety. A 2025 complications review reports that HA, used with standardized low-volume technique, generally has lower complication rates than PLA, PMMA, silicone, or self-injected materials, and HA can be dissolved with hyaluronidase if a problem appears. Permanent materials are a different story: PMMA and injected silicone are linked to granulomas, infection, and disfiguring inflammation that often needs surgical removal. The FDA states that injectable silicone is not approved for any aesthetic procedure.
No dermal filler is FDA-approved for use in the penis, so all penile filler is off-label. At InjectCo, HA filler for girth is offered as penile girth enhancement, and a good provider explains the off-label status, the risks, and the temporary nature before any plan is made. For a closer look at complication rates, read our guide on whether penis filler is safe.
Surgical approaches carry more risk and a longer recovery than fillers, and Cleveland Clinic notes that they often make the penis look bigger rather than change its true size.
The main techniques:
The American Urological Association’s policy is direct: it considers dividing the suspensory ligament for length and injecting fat for girth to be procedures that have not been shown to be safe or effective.
The complications review describes what can go wrong. Fat transfer and grafts can cause swelling, infection, tissue death, and contour deformities, and fat can shrink or overgrow unevenly. With the subcutaneous silicone implant, the original series of 400 men reported seroma in 4.8%, scarring in 4.5%, and infection in 3.3%, and other series describe erosion, curvature, shortening, and implant removal.
Other risks across enlargement surgery include scarring, uneven results, changes in sensation, dissatisfaction, and the need for revision. Talk through non-surgical options, and any concerns about body image, with a urologist before considering surgery.
Platelet-rich plasma (PRP) injections use a concentrate made from your own blood. Published research on PRP in the penis has focused on erectile dysfunction and Peyronie’s disease, mostly in small studies, not on size. There is no good evidence that PRP makes the penis larger, and PRP is not FDA-approved for erectile dysfunction or enlargement.
Stem cell and tissue-engineering approaches remain experimental. The FDA warns that regenerative medicine products need FDA approval before they are marketed and that it has received reports of blindness, tumor formation, and infections linked to unapproved products. If a clinic charges for stem cell enlargement outside a clinical trial, treat that as a red flag.
Men who would rather not have HA filler sometimes ask about BioGirth, InjectCo’s nonsurgical girth treatment made from your own blood using EZ Gel. Results and longevity vary by patient, so ask your nurse how it compares with HA filler for your goals.
| Method | Evidence level | What studies found | Reversible | Main risks |
|---|---|---|---|---|
| HA filler (girth) | Two randomized trials, 24-week follow-up | About 2.1 to 2.3 cm of girth at 24 weeks; fades over months | Yes, with hyaluronidase | Swelling, nodules, migration, infection; 4.3% complications over 6 months in 230 men |
| PLA filler (girth) | Same two randomized trials | About 1.6 to 2.0 cm of girth at 24 weeks | No | Nodules, granulomas, chronic pain |
| Permanent fillers: PMMA, injected silicone (girth) | Case series | About half of men in the largest PMMA series reported nodules or irregularities | No | Granulomas, infection, disfiguring inflammation; may need surgical removal |
| Fat transfer (girth) | Case series; AUA: not shown safe or effective | Variable; uneven absorption | No | Infection, tissue death, contour deformity |
| Silicone implant (girth) | Case series | Variable | Only by surgery | Seroma, infection, erosion, curvature, shortening |
| Suspensory ligament release (length) | AUA: not shown safe or effective | Mainly changes how much of the shaft shows | No | Surgical risks; revision |
| Traction device (length) | Small prospective studies | About 1.2 cm erect length after 4 months of daily wear in one study; no girth change | Not applicable | Discomfort; injury with overuse |
| PRP injections | Studied for ED and Peyronie’s, not size | No size change shown | Not applicable | Not established for this use |
| Pills, creams, pumps, jelqing | No good evidence | No lasting change shown | Not applicable | Tissue injury (jelqing, pumps); unknown ingredients (pills) |
Sources for the table: Yang 2020 and Ahn 2022 (filler trials), Quan 2021 (HA complications), Chen 2025 (traction, PMMA, at-home methods), Pignanelli 2025 (complications), the AUA policy statement, Israeli 2022 (PRP), Cleveland Clinic and Healthline (pumps, pills, jelqing, traction injury). Full links are listed at the end of this article.
Many men who ask about enlargement have a normal-sized penis. The medical literature uses the term “small penis syndrome” for excessive worry about size in men whose size is normal, and the first filler trial above enrolled exactly this group of men.
Men with body dysmorphia, small penis syndrome, anxiety, or expectations shaped by internet comparisons may not be satisfied regardless of results. A careful provider screens for this and may suggest counseling before, or instead of, a procedure.
Setting expectations matters. Filler creates a noticeable change, not a dramatic transformation; girth changes are measured in centimeters. Individual results vary, every procedure carries some risk, and most non-surgical options need aftercare and maintenance.
At InjectCo, we offer non-surgical girth enhancement as GlansGirth, our HA filler procedure that treats both the penile shaft and the glans in one visit. Treating both areas in balanced proportions helps avoid a result where one area looks enhanced and the other looks unchanged. Licensed nurse injectors perform the procedure with physician oversight, and because it uses HA, it can be dissolved with hyaluronidase if needed.
Pricing is set at consultation. If girth is your main goal, read our guide on how to increase girth without surgery before you book.
A licensed nurse explains what fillers can and cannot change, the risks, and whether you are a candidate.
Somewhat, depending on what you mean by size. Fillers can add girth for months, traction can add a small amount of length with daily use, and surgery carries higher risks. Pills, creams, pumps, and jelqing have no good evidence for lasting change. Before choosing anything, it helps to know that many men who seek enlargement already measure within the normal range.
In trials, yes, temporarily. HA filler added about 2.1 to 2.3 cm of girth at 24 weeks in two randomized trials, with no serious adverse events reported, and PLA filler added about 1.6 to 2.0 cm. The gain fades over the following months, and results vary. Penile filler is off-label, because no filler is FDA-approved for use in the penis.
Filler results are temporary, and how long they last varies. In one study that followed men for a year after HA filler, the flaccid girth gain went from about 3.4 cm at one month to about 2.4 cm at 12 months. Touch-up treatments can maintain the result. The randomized trials themselves followed men for only 24 weeks.
Surgery carries higher risks than filler, including infection, scarring, uneven results, changes in sensation, and the need for revision. The American Urological Association states that fat injection for girth and dividing the suspensory ligament for length have not been shown to be safe or effective. Anyone considering surgery should discuss the risks and alternatives with a urologist first.
Traction can add a small amount of length. In one study, men who wore a device 6 hours a day for 4 months had about 1.2 cm (roughly 0.5 inch) more erect length at a 6-month check. Longer-term data are limited, girth did not change, and many men find the daily wear hard to keep up. Overuse can injure the penis.
There is no good evidence that it does. Research on platelet-rich plasma (PRP) injections in the penis has focused on erectile dysfunction and Peyronie’s disease, mostly in small studies, not on size. PRP is not FDA-approved for erectile dysfunction or enlargement. Be cautious with any clinic that promises size gains from PRP or stem cell injections.
Only a small minority. A review pooling measurements from up to 15,521 men found an average erect length of 13.12 cm, about 5.2 inches, so 7 inches (about 17.8 cm) is well above average. The review did not report an exact percentage, and its measurements were taken by health professionals rather than self-reported.
Common effects are swelling, bruising, and tenderness. In a series of 230 men treated with HA filler, 4.3% had complications such as bleeding under the skin, nodules, or infection within six months, and all were treated without lasting harm. HA can be dissolved with hyaluronidase if needed. Permanent fillers such as PMMA and injected silicone carry higher risks.
The useful step is separating marketing claims from published evidence and keeping expectations realistic about what any method can change. Fillers have the clearest trial data for girth, traction has small studies for length, and surgery carries the highest risk.
GlansGirth treats both the shaft and the glans with a reversible HA filler, performed by licensed nurse injectors with physician oversight. If you want an honest conversation about whether it fits your goals, book a private consultation.
Private consultations with a licensed nurse injector. Results are temporary and vary by patient.
Dr. Allen earned his Doctor of Osteopathic Medicine at Lake Erie College of Osteopathic Medicine and completed his emergency medicine residency with Texas A&M. As Medical Director, he reviews InjectCo’s treatments, protocols, and patient education content for accuracy and safety across all nine Texas locations.
