OUR STORY · DENMARK · SINCE 1995

A bigger penis, or your money back.

We've taken 30 years of clinical data and put our money where our mouth is. Use SizeGenetics correctly for six months and don't see results — we'll refund you. Simple as that.

A bigger penis, or your money back..webp__PID:4d8e1b85-2678-4319-80f1-f63d02492520

6 months

Money-back guarantee

2-year

Product warranty

14 days

Return window (sealed)

100%

Discreet & confidential

What we guarantee

Four promises, in writing.

Buying an enlargement device shouldn't feel like a gamble. Here's exactly what we stand behind

Your safety

SizeGenetics is a clinically tested, FDA-Registered Class II medical device. Used as instructed — low tension, built up gradually — it's designed so you never experience injury.

Results

It's the most effective extender on the market, backed by clinical testing, doctor endorsements, decades of research and a million real users. If it can work for them, it can work for you.

High quality

Manufactured and assembled in Denmark to the highest standards with the finest materials. Every single device must pass strict quality testing before it's ever allowed to be sold.

2-year warranty

Covered against errors in production and assembly under normal use. Hit a problem? Snap a few photos, attach them to our warranty form, and we'll sort it out for you.

The promise

You've got nothing to lose, and everything to gain.

We guarantee our product will give you an enlargement when used correctly and diligently. If it doesn't, you get your money back — no drama, no runaround.

That's not marketing bravado. It's what 30 years of clinical data and a million satisfied users let us say out loud.

Real results, or a real refund.

How the refund works

Qualifying is simple — here's exactly how.

The money-back guarantee is real and claimable. To keep it fair, we just ask that you actually use the device as intended and track your progress. Four things:

1

Put in the hours

Complete 600 hours of training within your first 6 months. That's the amount shown to produce results.

2

Use proper tension

Train at an average traction of about 2,000 g, so the device is working the way it's meant to.

3

Log it weekly

Record your measurements each week in your online training diary — the link is in your order confirmation.

4

Before & after photos

Take a before and after photo with the device applied and a ruler on the shaft, so we can confirm correct use.

Warranty & returns

If something's wrong, we make it right.

Product warranty

2-year warranty

Your device is covered for two years against errors in production and assembly. The issue just needs to have occurred during normal use.

Claiming is easy:

  • Take a few clear photos of the problem.
  • Attach them to our warranty form.
  • Send it in — we'll take it from there

Unused product returns

14-day returns

Changed your mind? You can return an unopened product within 14 days of delivery. The window starts the day your order arrives.

Three conditions:

  • Notify us within 14 days of receiving it.
  • The sealed plastic bag must be unopened.
  • Full kit, in its original packaging

⚠️ For hygiene reasons, the right of return on intimate products ends once the sealed packaging is opened. Opened products can't be returned or refunded.

DanaMedic ApS
Maglebjergvej 4, 2800 Kgs. Lyngby, Denmark
support@sizegenetics.com

Already opened it? Still here for you.

Used your device and hit a snag?

Don't send it back yet. Just tell us exactly what's going on and we'll help you fix it — the vast majority of issues come down to comfort or fit, and those are solvable.

We even have medical staff on hand if it becomes relevant, and there's no cost to you for that support.

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.

SHOP NOW

Got A Question?  Ask Now

Try it risk-free

Three decades. One million devices. Zero surgical risk.

Every package is backed by a full 6-month money-back guarantee - because we trust the science that started this whole category.

Rated Excellent on Trustpilot · 1,000,000+ devices sold worldwide