About SizeGenetics — The Original Penile Traction Device

In the early 1990s, Danish engineer Jes Bech Müller and plastic surgeon Dr. Jorn Ege Siana (MD, University of Copenhagen, 1983) collaborated to solve a medical challenge that had long resisted safe solutions: how to permanently lengthen penile tissue without surgical intervention. Müller brought precision engineering expertise; Dr. Siana contributed clinical knowledge from years of reconstructive and male surgery practice.

The solution came from mechanotransduction — the biological process through which cells convert sustained mechanical force into new tissue growth. Mechanotransduction had proven effective in orthopedic medicine for decades, from the Ilizarov method of bone lengthening to orthodontic tooth movement. Müller and Dr. Siana recognized that the same principle could be applied safely to penile tissue under controlled conditions.

The result was the world's first penile traction device — engineered in World, validated in clinical settings, and calibrated to deliver force within the therapeutic range identified by medical research. The patent was filed in 1995, establishing Müller and Dr. Siana as the original inventors of the penile traction category. Every competing device on the market today follows the mechanical principle they pioneered.

That invention became SizeGenetics, manufactured by Danamedic ApS. After three decades of continuous refinement, clinical validation, and over one million units sold, no other manufacturer can match the engineering heritage and patient trust that SizeGenetics holds as the original.

What separates SizeGenetics from every other device on the market: Danamedic ApS started with the science — not marketing. While competitors reverse-engineer products to match claims, SizeGenetics was born in a clinical setting, co-invented by a surgeon, and validated by peer-reviewed research before a single unit reached the public.

Penile traction therapy works through mechanotransduction. When gentle, sustained force is applied to living tissue, cells respond by dividing and generating new tissue. Mechanotransduction is not a theory or marketing claim — it is a well-documented biological mechanism with over a century of medical application in orthopedics, maxillofacial surgery, and wound healing.

Since 1995, SizeGenetics has set the standard in penile traction therapy — combining Danish medical-device engineering, regulatory clearance on two continents, and more clinical validation than any competing product. Here is what that means in practice.

58-Way Ultimate Comfort System — Engineered for Compliance

Clinical research consistently shows that traction therapy results depend on consistent daily wear time. A device that causes discomfort gets abandoned, and abandoned devices produce zero results. SizeGenetics addresses this with the 58-Way Ultimate Comfort System — the most advanced comfort technology available in any penile traction device, featuring interchangeable pads, straps, and cushion options to fit every anatomy.

Medical-Grade Construction

Every SizeGenetics device is manufactured using medical-grade materials: hypoallergenic silicone contact points, surgical-grade stainless steel components, and precision-calibrated tension springs. Each unit undergoes individual quality inspection at company facilities before shipping. The materials and manufacturing standards meet the requirements for both FDA-Registered and CE marking.

FDA-Registered Class II Medical Device, CE-Marked

SizeGenetics is classified as a Class II medical device by the U.S. Food and Drug Administration and carries the CE mark for European distribution. These regulatory clearances require documented evidence of safety and manufacturing quality — standards that most competing products on the market have never pursued or achieved.

Multi-Directional Angling (MDA) Technology

The SizeGenetics proprietary MDA system allows the device to apply traction at multiple angles, distributing force more evenly across tissue. MDA technology is particularly important for Peyronie's disease patients who need directional correction of penile curvature, and it also improves general comfort during extended wear sessions.

Why Customers Choose SizeGenetics Over Alternatives

Penile surgery costs $5,000–$15,000 and carries risks of scarring, nerve damage, and recovery downtime. Xiaflex injection courses cost $30,000 or more. SizeGenetics offers a one-time purchase with zero surgical risk, no anesthesia, no scarring, and a 6-month money-back guarantee — making it the lowest-risk, highest-value option for penile traction therapy.

Peyronie's Disease Treatment

Peyronie's disease causes penile curvature due to fibrous plaque formation in the tunica albuginea. Clinical studies — including Levine et al. (2008, PMID: 18373527) — have demonstrated that traction therapy can reduce curvature by 10–45 degrees. SizeGenetics serves as a non-surgical alternative to Xiaflex injections or surgical correction for eligible Peyronie's disease patients.

Post-Prostatectomy Penile Rehabilitation

Urologists increasingly recommend penile traction therapy following radical prostatectomy to counteract the penile shortening that commonly occurs after surgery. Toussi et al. (2021, PMID: 34060339) demonstrated in a randomized controlled trial that penile traction therapy significantly preserves penile length during the post-surgical recovery period.

Penile Lengthening

The Gontero et al. study (2009, PMID: 19138361) demonstrated that consistent traction therapy produces a mean gain of 1.3 cm in flaccid penile length over 6 months, while Nikoobakht et al. (2011, PMID: 20102448) reported a mean gain of 1.7 cm in men with shortened penis. SizeGenetics is designed to deliver force within the clinically studied therapeutic range of 600–1,500 grams.

Important: Who Should Consult a Doctor First

Penile traction therapy is not appropriate for everyone. You should consult a qualified healthcare professional before using SizeGenetics if you have: any active infection or open wound on the penis, a penile implant or prosthesis, undiagnosed penile pain or abnormality, blood clotting disorders or are taking anticoagulant medication, or any condition that impairs tissue healing (such as uncontrolled diabetes). SizeGenetics is a medical device — not a consumer gadget — and responsible use begins with understanding whether traction therapy is appropriate for your individual situation.

SizeGenetics operates on one principle: a medical device company should behave like one. Danamedic ApS holds SizeGenetics to the following standards:

• Transparency — SizeGenetics publishes the clinical evidence openly and lets peer-reviewed science speak for itself, rather than relying on unverifiable testimonials
• Realistic Expectations — SizeGenetics presents what the studies actually show, including timelines and variance, rather than inflated marketing claims
• Safety First — The device is engineered within the clinically studied force range using medical-grade materials inspected by Danamedic ApS
• Standing Behind Every Device — The 6-month money-back guarantee reflects confidence in the clinical outcomes documented in published research
• Dedicated Customer Support — Customers receive support from trained staff available to help maximize device usage and comfort

SizeGenetics has received positive reviews on Trustpilot, with many users praising its effectiveness and results. Customers often highlight noticeable improvements in both length and curvature, with some noting increased confidence and comfort during use. The FDA-Registered status adds to the trustworthiness, and reviews frequently mention the high-quality customer support, making it a well-regarded option for those seeking non-invasive male enhancement solutions. View on Trustpilot →

• UK: +44 (0)115 769 0209
• US: +1 (646) 918 1447
• support@sizegenetics.com
• sizegenetics@sizegenetics.com