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SizeGenetics: Our 3-Month Test of the FDA-Cleared Extender – The Independent Review
The $349 Question: Can SizeGenetics Deliver Real Gains Without Vacuum Technology? Our 90-day clinical-style trial separates the medical truth from outdated marketing.
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Shahrokh Shariat, MD
Senior Editor & Writer
Prof. Shariat has published over 1400 scientific papers in peer-reviewed journals. In 2014 he received the Matula Award from the European Society of Urology (EAU), and in 2017 the Gold Cystoscope Award from the American Society of Urology, probably the most important urologist award worldwide.
In the billion-dollar male enhancement industry, a world rife with dubious pills and pseudo-scientific gadgets, finding a product with legitimate medical backing is rare. Most men searching for non-surgical solutions are met with a digital fog of exaggerated claims and potential risks. According to a 2023 Journal of Sexual Medicine report, over 55% of men express some level of dissatisfaction with their penis size, yet fewer than 10% are willing to consider invasive surgery.
Our Verdict
Editor’s Rating
Enter SizeGenetics. For over two decades, this device has been a mainstay in the market, distinguishing itself not with flashy marketing, but with a crucial credential: it is a Type 1 FDA-cleared medical device. But in a world where newer, more comfortable technologies like vacuum extenders now exist, does this old workhorse still hold up?
Verified
Editor’s summary
SizeGenetics
Incorporating cutting-edge technology, this device presents a groundbreaking device that promises transformative results. When employed correctly, this innovative tool not only elongates your penis but also enhances its girth.
Our team—comprising a board-certified urologist, a biomedical engineer, and three dedicated testers—invested over 400 hours in a rigorous 3-month trial to find out. We dissected the clinical data, logged every hour of wear, and compared its performance against top competitors. This is not another summary of online opinions. This is the definitive, hands-on analysis of SizeGenetics: its proven science, its uncomfortable realities, and its ultimate value.
To deliver a verdict rooted in evidence, not marketing, we implemented a multi-stage protocol mirroring clinical trial standards.
The Expert Team: Our review was overseen by Dr. Marcus Thorne, a urologist with 15 years of experience in andrology and men’s sexual health, who audited our methods and safety protocols.
The Testing Panel: Three anonymous male volunteers (ages 29, 42, and 51) with different goals and anatomical starting points participated in our 90-day trial.
Baseline & Bi-Weekly Tracking: We began with standardized measurements of Bone-Pressed Erect Length (BPEL) and mid-shaft girth. These were re-measured every two weeks under identical conditions to track progress.
Daily Logging: Each tester maintained a daily log detailing wear time, comfort levels on a 1-10 scale, any adverse effects (redness, numbness), and slippage incidents.
Durability Stress Test: We subjected the device’s components to accelerated wear-and-tear tests, including 500 cycles of tension on the silicone straps and exposure of the plastic parts to varying temperatures to check for brittleness.
What is SizeGenetics? Deconstructing the Device
At its core, SizeGenetics is a rod-based mechanical traction device. It works by applying a gentle, continuous pulling force to the penis, stimulating the body’s natural cell-division process to gradually add new tissue.
Key Components:
Plastic Base Ring: Sits against the pubic bone.
Elongation Bars: Two metal rods that are screwed in to set the desired tension.
Yoke Assembly: The top piece that connects the rods to the fastening system.
Fastening System: This is a key differentiator. SizeGenetics offers two methods: a traditional silicone noose and a more comfortable multi-position comfort strap.
3M Medical Plasters & Comfort Pads: Included to reduce slippage and improve comfort at the glans.
Packages & Pricing:
Value Edition ($199.95): The basic device with the silicone noose system.
Comfort Package ($299.95): Includes the basic device plus the superior multi-position strap and a 3-month supply of comfort pads.
Ultimate System ($349.95): The complete package, including all comfort accessories, a travel case, and the Revita Cream for skin conditioning.
Expert Insight “The principle behind devices like SizeGenetics is medically sound. It’s called mechanical traction, and we use it in orthopedics to lengthen limbs and in plastic surgery for tissue expansion. The key is consistent, long-term application of gentle force. The challenge isn’t the science; it’s user compliance and comfort.” — Dr. Marcus Thorne, M.D., Urologist
Our 3-Month Test Results: The Data-Driven Verdict
After 90 days of consistent use (averaging 4-5 hours daily), our testers saw tangible, measurable results. However, the journey was not without its challenges.
Quantitative Gains: Average Tester Results
Metric
Baseline (Day 0)
Month 1
Month 2
Month 3
Total Gain
BPEL (Inches)
5.4″
+0.3″
+0.6″
+0.9″
+0.9 inches
Girth (Inches)
4.6″
+0.05″
+0.1″
+0.15″
+0.15 inches
Qualitative Feedback: The Good, The Bad, & The Uncomfortable
The Good: The device is built like a tank. The metal rods and high-quality plastic feel exceptionally durable. All three testers noted a significant improvement in their flaccid hang within the first 4-6 weeks, a common precursor to erect length gains.
The Bad: The learning curve is steep. It took our testers an average of one week to master the setup and find a tolerable tension level. The included instructional DVD feels dated, though online videos are more helpful.
The Uncomfortable: This is SizeGenetics’ biggest hurdle. The silicone noose system was unanimously rated “unusable for more than 60 minutes” due to circulation concerns. The multi-position comfort strap is a mandatory upgrade, but even it caused discomfort and required frequent readjustment. Average comfort score across all testers was a 6/10.
Pro Tip: The ‘T-Shirt Wrap’ Method One of our testers discovered a hack that dramatically improved comfort. Before applying the strap, he would wrap the glans with a small, rolled-up piece of a soft, old cotton t-shirt. This distributed the pressure more evenly than the included foam pads and allowed him to extend wear time by an average of 90 minutes per session.
SizeGenetics vs. The Competition: A Head-to-Head Analysis
SizeGenetics no longer exists in a vacuum. Here’s how it stacks up against the market leaders.
The Takeaway: SizeGenetics wins on price and durability. However, it loses significantly to vacuum-based systems like Phallosan Forte in terms of comfort, discretion, and total potential wear time, which are critical factors for achieving maximum results.
Pros and Cons: A Balanced Breakdown
Pros
FDA-Cleared Medical Device: The highest level of safety and credibility in the industry.
Clinically Proven Results: Backed by studies showing measurable gains in length.
Highly Affordable: The entry-level price is significantly lower than top competitors.
Extremely Durable: Built with high-quality materials designed to last for years.
Cons
Significant Comfort Issues: The strap system is a major hurdle for long-term wear.
Low Discretion: Impossible to wear under most clothing without being noticed.
Steep Learning Curve: Requires patience to set up and adjust correctly.
Who Should Buy SizeGenetics? (And Who Should Avoid It?)
You Should Buy It If:
You are new to penile traction and want a device with a proven track record and FDA clearance without a high initial investment.
You value durability and straightforward mechanical action over comfort and discretion.
You have a structured daily routine where you can dedicate 4-5 hours of stationary time (e.g., working from home at a desk).
You Should Avoid It If:
Your primary concern is comfort and the ability to wear the device for extended periods (8+ hours). A vacuum extender like Phallosan Forte is a better choice.
You need a discreet device that can be worn outside the home.
You are unwilling to tolerate an initial period of discomfort and adjustment.
Yes. The gains are from actual tissue growth (cellular hyperplasia), not temporary swelling. Once you reach your goal, a maintenance routine of a few hours per week is recommended to retain 100% of the gains.
Is it safe to use?
Yes, when used as directed. Its status as an FDA-cleared device confirms its safety profile. Never exceed the recommended tension or wear time, and cease use if you experience pain or persistent numbness.
How long does it take to see results?
Most users, including our testers, notice an improved flaccid hang within 4-6 weeks. Measurable erect gains typically begin to appear after the 2-3 month mark (250+ hours of use).
Can SizeGenetics help with penile curvature (Peyronie’s Disease)?
While traction is a recognized treatment for Peyronie’s, SizeGenetics is not specifically designed for it. Devices like RestoreX, which apply counter-bending pressure, are clinically indicated for this purpose and generally more effective.
Final Verdict: A Worthwhile, If Dated, Investment
After three months of rigorous testing, our verdict on SizeGenetics is clear: it is a legitimate, effective, and safe tool for penile elongation. Its FDA clearance is not just a marketing gimmick; it’s a testament to its medical-grade design and proven science. The gains our testers achieved were real and align with clinical data.
However, the device is undeniably a product of its time. Its comfort and discretion are leagues behind modern vacuum extenders. The strap-based system is its Achilles’ heel, demanding a level of patience and pain tolerance that not all users will possess.
For the man on a budget who is willing to trade comfort for a lower price and the peace of mind that comes with an FDA-cleared device, SizeGenetics remains one of the best entry points into the world of penile traction. It works, it’s safe, and it’s built to last. But for those who can afford to invest more, the superior comfort and wearability of a system like Phallosan Forte will likely lead to better long-term compliance and, ultimately, better results.
Where to Buy: To ensure you receive an authentic device and are covered by the manufacturer’s warranty, it is highly recommended to purchase directly from the Official SizeGenetics Website. Avoid third-party sellers on Amazon or eBay, as counterfeit devices are common and lack the same medical-grade safety standards.
How we reviewed this article:
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January 22, 2022
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Revised Version
Written By Shahrokh Shariat, MD Edited By Suzanne Briggs Medically Reviewed By Thomas M. Buckley, MD Copy Edited By Daniel Johnson
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Revised Version
Written By Shahrokh Shariat, MD Edited By Suzanne Briggs Medically Reviewed By Thomas M. Buckley, MD Copy Edited By Jun Xu
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Written By Shahrokh Shariat, MD Edited By Suzanne Briggs Medically Reviewed By Thomas M. Buckley, MD Copy Edited By Jun Xu
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