The most trusted penile Lengthening device in the world

Clinically proven traction therapy. Results that stay permanently.

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Top Men'sHealth Product

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Best PenisExtender

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Increase Penile GirthSize Permanently

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Best Penis Extender: No Surgery,No Pain, Only A Larger Penis

Over 1 Million+  Device Sold

in the comfort of your own home really is possible.

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The Science Behind SizeGenetics

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The Science

Gentle, consistent traction places controlled tension on penile tissue. This stimulates the body's natural tissue-expansion process, encouraging cellular growth and remodeling over time. As new tissue develops, both length and girth can gradually increase.

How This Helps

Regular use supports measurable gains in penile size by promoting natural tissue growth. Because the process relies on your body's own adaptive response, results can be gradual, natural-looking, and long-lasting.

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The Science

The SciencePenile curvature is commonly caused by uneven fibrous or scar tissue beneath the skin, a condition known as Peyronie's disease. Consistent traction from SizeGenetics gently stretches and remodels this restrictive tissue over time. As the scar tissue softens and redistributes, the natural structure of the penis begins to gradually straighten.

How This Helps

Regular, calibrated tension applied to the area of greatest restriction encourages the tissue to lengthen and realign. Because the correction works through the body's own natural tissue-remodeling response, results develop progressively over months of consistent use, without the risks of surgery, injections, or medication.

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The Science

Consistent traction promotes increased blood flow by gently expanding the vascular structures and surrounding tissue. As the device encourages tissue remodeling over time, the capacity of the erectile chambers can increase, allowing for improved engorgement and firmness during arousal.

How This Helps

Men who use SizeGenetics consistently often notice improvements in erection quality alongside physical size gains. By supporting healthier tissue, better circulation, and greater chamber capacity, the device can contribute to fuller, firmer erections that feel more natural, reliable, and sustainable over time.

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FDA-Registered

Class II Medical Device

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CE Certified

European Medical Standard

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Made Since 1995

30+ Years of Trust

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1,000,000+ Devices

Sold Worldwide

Shop SizeGenetics

Clinically-designed traction systems engineered to support natural penile enhancement, curvature correction, and sexual wellness.

Comfort package
Comfort package
Comfort package
SAVE 40%
Comfort package
Comfort package
Comfort package

Comfort package

$249.95
$399.95
Value edition
Value edition
Value edition
Value edition
SAVE 40%
Value edition
Value edition
Value edition
Value edition

Value edition

$199.95
$274.95
SizeGenetics Ultimate System penile traction device kit — FDA-registered and CE-certified, with full accessory set
SizeGenetics Ultimate System full kit — traction device, elongation bars, comfort strap, accessories and leather storage case
Straight one-direction longitudinal traction applied along the penile shaft over months of consistent daily wear
SAVE 40%
SizeGenetics Ultimate System penile traction device kit — FDA-registered and CE-certified, with full accessory set
SizeGenetics Ultimate System full kit — traction device, elongation bars, comfort strap, accessories and leather storage case
Straight one-direction longitudinal traction applied along the penile shaft over months of consistent daily wear

Penile Traction Device Kit — SizeGenetics® Ultimate System (FDA-Registered & CE-Certified)

$299.95
$499.95
SizeGenetics® Penile Curvature & Peyronie's Edition - At-Home Medical Traction Device (FDA-Registered)
SizeGenetics® Penile Curvature & Peyronie's Edition - At-Home Medical Traction Device (FDA-Registered)
SizeGenetics® Penile Curvature & Peyronie's Edition - At-Home Medical Traction Device (FDA-Registered)
SAVE 40%
SizeGenetics® Penile Curvature & Peyronie's Edition - At-Home Medical Traction Device (FDA-Registered)
SizeGenetics® Penile Curvature & Peyronie's Edition - At-Home Medical Traction Device (FDA-Registered)
SizeGenetics® Penile Curvature & Peyronie's Edition - At-Home Medical Traction Device (FDA-Registered)

SizeGenetics® Penile Curvature & Peyronie's Edition - At-Home Medical Traction Device (FDA-Registered)

$299.95
$499.95

Results Timeline

What to expect month by month. Answers the biggest buyer question without them having to ask.

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Day 1–30

Adjustment period, comfort, first sensations

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Month 2–3

Adjustment period, comfort, first sensations

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Month 4–6

Adjustment period, comfort, first sensations

Real Customer Reviews

Consistency Pays Off

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Real results just have to put the work in...also because the extender is made with great material, it also allows you to comfortably wear for longer than other extender

-Milton Cummings   ✔

Outstanding Comfort

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I’ve tried several extenders, but this one truly stands out. It is exceptionally comfortable and effective, and I can wear it for extended periods without discomfort.

-Eric Farrel   ✔

Results Speak for Themselves

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This device works if you use it consistently. The design is comfortable, and the improvements are gradual but noticeable.

-Alex Redden   ✔

Practical and Effective

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I appreciate how easy this is to add into my routine. It is comfortable, discreet, and well-designed. Definitely a great choice for anyone looking for real results.

-Jack Palumbo   ✔

Delivers What It Promises

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I was looking for something comfortable and effective, and this exceeded my expectations. The gradual progress is visible, and I’m excited for even more results.

-Scott Smith   ✔

Thoughtfully Designed

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SizeGenetics is one of the best purchases I’ve made. The design is well thought out, the fit is adjustable, and it is easy to wear for long hours.

-Jasper Hardy   ✔

Comfortable and Reliable

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I’ve tried other extenders, but none compare to this. The design allows for extended wear without discomfort, and the materials feel premium.

-James Neal   ✔

Exceptional Product

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The team is responsive and helpful, and the product is excellent quality. After a few months of regular use, I’ve seen results that exceeded my expectations.

-Earl Williams   ✔

Our Medical Advisory Board

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Dr. Jorn Ege Siana, M.D.

Specialist in General and Plastic Surgery

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DR. Finn Worm Knudsen M.D.

SPECIALIST IN PLASTIC SURGERY

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Dr. Michael A. Carter, Psy.D.RCP

Doctor of Clinical Psychology

MEET OUR DOCTORS

Frequently Asked Questions

Does SizeGenetics actually work?

The SizeGenetics™ device is based on age-old traction techniques that have been practiced for thousands of years to enlarge body parts. It works by applying a constant traction force along the penile shaft to make it longer, thicker and harder. If you stretch a balloon, it becomes more supple and can hold more air. The same principle applies with the penis.

Is the SizeGenetics™ device safe? What medical backing does it have?

SizeGenetics™ is a certified US medical type 1 device. Doctors have also endorsed our powerful traction device. So you can have total peace of mind that SizeGenetics™ is both medically backed and completely safe to use.

Are the results permanent?

The SizeGenetics™ system uses a constant traction force to increase the number of penile tissue cells within the penis. This is called citokineses. This traction force multiplies the cells within the member permanently, which means any enlargement you see will be permanent.

How long will it take to see results?

Although results will vary depending on the individual and how long you wear your SizeGenetics™ device, many of our thousands of satisfied customers have seen results in just a few weeks!

How long per day do I have to wear the SizeGenetics™ device?

We recommend that you wear your SizeGenetics™ device for between 3-6 hours per day. You may want to start wearing the device for just a few hours per day before building up to 6 hours, to allow your penis time to get used to being stretched. Every hour counts as the same, so wearing your device for 6 hours per day for 10 days will give you the same result as wearing it for 3 hours per day for 20 days.

Will it increase my flaccid length as well as my erect length?

Yes, you will see an increase in both your flaccid and erect penis length when you use the SizeGenetics extender.

Will I keep getting results if I keep wearing SizeGenetics™?

Yes! As long as you continue wearing your SizeGenetics™ device you’ll continue to see results.

If I stop using SizeGenetics™, will my penis go back to its original size?

No! Because the SizeGenetics™ device increases the number of cells within the penile tissue permanently, the results you get with SizeGenetics™ are also permanent.

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