Penuma Silicone Implant: The Only FDA-Cleared Penis Enlargement Device

The Penuma implant received FDA 510(k) clearance in 2004, making it the only device specifically cleared for cosmetic penile enlargement in the United States. Unlike fillers that are injected and absorbed over time, Penuma is a soft, crescent-shaped silicone sleeve surgically placed beneath the penile skin — providing a permanent increase in girth and some increase in flaccid length. A 2018 clinical study published in the Journal of Sexual Medicine reported meaningful gains in girth with a 95.7% patient satisfaction rate, making it one of the more rigorously documented options in male enhancement.

What Is the Penuma Implant?

Penuma is a solid silicone implant designed specifically for cosmetic penile enlargement. It was developed by Dr. James Elist, a Beverly Hills urologist, and has been refined through multiple iterations since its original FDA clearance. The device is a crescent-shaped sleeve made from medical-grade solid silicone — the same class of material used in many long-standing medical implants.

Unlike penile prostheses for erectile dysfunction (which replace the function of the corpora cavernosa), Penuma is placed subcutaneously — between the skin and Buck's fascia — along the dorsal (top) and lateral (sides) surfaces of the penile shaft. It does not enter the corpora or interfere with the erectile mechanism. Men with normal erectile function before Penuma surgery retain that function afterward.

Penuma comes in three size categories — large (L), extra-large (XL), and extra-extra-large (XXL) — based on the man's baseline anatomy and the surgeon's assessment. The device is custom-selected to fit the patient; it is not a one-size solution. Penuma is only available through certified Penuma providers who have completed training with the manufacturer.

How Penuma Adds Girth and Length

The mechanics of Penuma's enlargement effect are straightforward. The implant is placed as a sleeve around the shaft. Its physical presence beneath the skin adds circumference — girth — directly and permanently. Because the silicone is solid and non-compressible, the increase is present in both the flaccid and erect states, though the magnitude differs between states.

The 2018 clinical study (Elist et al., Journal of Sexual Medicine) measured outcomes in 400 men who underwent Penuma implantation. Average circumference gains were approximately 1.5 inches (roughly 3.7 cm) in flaccid girth, with smaller but meaningful increases in erect girth. Flaccid length also increased on average, because the implant physically extends the visible shaft when flaccid. Erect length changes are more modest and variable.

It is important for prospective patients to understand that Penuma is primarily a girth enhancement device. Men seeking dramatic erect length gains should understand that Penuma is not primarily engineered for length. Realistic expectations regarding which dimension improves most — and by how much — are essential to satisfaction with the outcome.

Who Qualifies for Penuma?

Penuma candidacy requires evaluation by a certified Penuma provider. General eligibility criteria include:

• Adult males (typically 21 or older) who are in good overall health
• Non-smokers or men who can stop smoking before and after surgery (smoking impairs healing and increases infection risk)
• Men who are circumcised, or who are willing to undergo circumcision at the same time as Penuma placement (circumcision is required for proper device placement and healing)
• Men without active urinary tract infections, sexually transmitted infections, or other active penile pathology
• Men who have realistic expectations about outcomes and understand that Penuma primarily adds girth, not dramatic erect length
• Men with a penile anatomy and baseline size that accommodates the device (men with very small baseline penile dimensions may not be appropriate candidates)

Men with a BMI over approximately 40 are generally not considered ideal candidates due to increased surgical and healing complexity. Men with Peyronie's disease or significant penile curvature require individual evaluation. Men with erectile dysfunction should address that condition separately before or alongside considering Penuma.

The Penuma Procedure Step by Step

Penuma implantation is performed under general anesthesia and typically takes 30–45 minutes. The procedure is almost always done on an outpatient basis, with the patient going home the same day.

The surgical steps are as follows:

• Incision: A small incision is made at the base of the penis, typically at the penoscrotal junction, within a natural skin fold that minimizes visible scarring.
• Pocket creation: The surgeon creates a subcutaneous pocket beneath the penile skin and above Buck's fascia along the dorsal and lateral shaft surfaces. This is the space where the implant will sit.
• Implant sizing and placement: The appropriate Penuma size (L, XL, or XXL) is selected based on pre-operative measurements and intraoperative assessment. The crescent-shaped device is inserted and positioned to sit naturally along the shaft.
• Circumcision (if needed): If the patient was not previously circumcised, circumcision is performed at the same time, as the foreskin must be removed to prevent complications with the implant.
• Closure: The incision is closed in layers. A dressing and support garment are applied.

Because Penuma is solid silicone rather than an inflatable or injectable device, there are no tubes, pumps, or reservoirs. The implant is entirely subcutaneous and self-contained.

Recovery and Return to Sexual Activity

Recovery from Penuma surgery is longer than many men anticipate. The subcutaneous placement of a rigid silicone device requires the surrounding tissue to heal fully before sexual activity is safe. Rushing recovery is the most common cause of complications.

• Week 1–2: Significant swelling and bruising are expected. The penis may appear dramatically enlarged due to post-operative edema — this is temporary and not representative of the final result. Pain is typically well-controlled with oral medications. Light walking is encouraged; no strenuous activity.
• Week 2–4: Swelling begins to subside. Driving and desk work are typically resumable within 2 weeks. The support garment should be worn as directed.
• Week 4–6: Continued healing. Most men can return to non-strenuous exercise. The device is settling into its position.
• Week 6–8: Surgeon clearance for sexual activity is typically given around 6–8 weeks post-op, only after a follow-up examination confirms adequate healing.
• Months 3–6: Final results become apparent as all residual swelling resolves and the device fully integrates with surrounding tissue.

Men should follow their surgeon's post-operative protocol exactly. In particular, erections during recovery — which occur naturally during sleep — can cause discomfort and should be managed with ice and medication as directed by the surgeon. Some providers prescribe a brief course of medication to suppress nocturnal erections during the initial healing phase.

Clinical Results and Patient Satisfaction Data

The primary published clinical data on Penuma comes from the 2018 Elist study in the Journal of Sexual Medicine, which evaluated 400 men over a multi-year period. Key findings:

• Average flaccid girth increase: approximately 1.5 inches (3.7 cm)
• Average erect girth increase: approximately 0.9 inches (2.3 cm)
• Average flaccid length increase: approximately 0.6 inches (1.5 cm)
• Patient satisfaction rate: 95.7%
• Complication requiring explantation: approximately 3.8% of cases (mostly infection or implant displacement)

These are meaningful numbers. A 95.7% satisfaction rate in a cosmetic surgical population is high. The complication rate requiring removal is low, though not negligible — and prospective patients should understand that device removal is a real possibility if complications occur.

It is worth noting that all published Penuma clinical data comes from the device's inventor and primary provider. Independent third-party studies are limited. This does not invalidate the data, but it is a factor worth acknowledging when evaluating clinical claims.

Penuma vs Filler: Key Differences

Men researching girth enhancement often compare Penuma to hyaluronic acid (HA) filler injections. These are fundamentally different procedures with different risk profiles, results, costs, and permanence.

• Permanence: Penuma is permanent. HA filler is temporary (12–24 months) and dissolves naturally or can be dissolved with hyaluronidase. PMMA filler is permanent but works differently.
• Girth increase: Penuma typically adds more girth than a single session of HA filler. HA filler results depend on the volume injected and the technique used.
• Invasiveness: Penuma requires general anesthesia and a surgical incision. HA filler is an in-office injection procedure under local anesthesia with no incision and minimal downtime.
• Recovery: Penuma requires 6–8 weeks before sexual activity. HA filler typically allows return to sexual activity within 1–2 weeks.
• Reversibility: HA filler can be dissolved. Penuma can be removed surgically, but removal is a more significant procedure and may leave some scarring.
• Cost: Penuma is significantly more expensive than HA filler. See cost section below.
• FDA status: Penuma is the only FDA-cleared device for cosmetic penile enlargement. HA filler is used off-label (no filler is FDA-approved specifically for penile use).

Cost and Where to Get Penuma

Penuma is only available through certified Penuma providers — surgeons who have completed training directly with the manufacturer. As of 2026, there are approximately 30–40 certified providers in the United States, concentrated in major metropolitan areas. The limited provider network is intentional; the manufacturer requires training to ensure proper patient selection and surgical technique.

The total cost of Penuma surgery in the United States typically ranges from $13,000 to $20,000, including surgeon fees, anesthesia, facility fees, and post-operative care. The device itself carries a significant cost, which is why out-of-pocket pricing is higher than many filler procedures. Financing options are available through most Penuma practices.

Penuma is a cosmetic procedure and is not covered by health insurance. Men considering Penuma should budget not only for the procedure itself but also for time off work during recovery (typically 1–2 weeks) and any travel costs if their nearest certified provider is not local.

To find a certified Penuma provider, visit the official Penuma website (penuma.com) for a provider locator. When consulting with a potential surgeon, ask about their specific Penuma case volume, their complication and revision rates, and what their protocol is if the device needs to be removed. A high-quality surgeon will have clear, transparent answers to all of these questions.