A Bigger Penis Or Your Money Back

SizeGenetics™ removes all the risk from buying a penis enlargement device. The method behind our devices has been clinically tested and proven to work, so you can purchase with full confidence that SizeGenetics™ will extend your penis safely and effectively. Read more about our method here

Our money back guarantee promises that your SizeGenetics™ will work for you or we’ll refund you your full purchase price. You’ve got nothing to lose, and everything to gain!



Your safety

Our penis extenders have been clinically tested and have been certified as a medical type one device. Use SizeGenetics™ as instructed and you should never experience an injury.

High quality

Don’t settle for a cheaper, inferior device that can at best, break during use and cost you a small fortune in spare parts, or at worst, seriously injure your penis. SizeGenetics™ is manufactured to the highest standards using the finest quality materials, and every single device must pass our strict quality testing before it is allowed to be sold.

Penis Extension

We firmly believe that SizeGenetics™ is the most effective penis extender device available on the market. We are backed by clinical testing, doctor endorsements, years of research and real user testimonials, proving that it can work for everyone, including you!

You’ll find our money back guarantee really simple, because we believe 100% that SizeGenetics™ will work for you.

Simply use your SizeGenetics™ device for 1,000 hours of training in maximum nine months from purchase date, and the refund is yours. Only one refund per customer.

In the highly unlikely event that you don’t see any increase in the size of your penis (or improvement in the curvature of your penis if using the device to treat peyronie’s), get in touch with us to request your refund.

Why do you need to use
your device for 1,000 hours?

While many of our customers begin to see gains within the very first few weeks, the speed of results varies from person to person. By using the SizeGenetics™ device daily for 1,000 hours, you’ll be allowing your body sufficient time for the device to work for you.

To qualify for a refund, we will need to see the following documentation as evidence that you have used your SizeGenetics™ device in accordance with the instructions:

A before photograph and an after photograph of your penis next to a measuring device such as a tape measure or ruler (you must be wearing your SizeGenetics™ device in each photo, and the average traction of the device must be visible).

A diary/log detailing the days and the number of hours you have used your SizeGenetics™ device throughout the 1,000 hours, including the amount of traction used each time. To qualify for a refund you must have used the device for at least 5 hours daily, at a minimum of 1200g traction.

The money-back guarantee can be claimed at any time during your first nine months with our product (only one refund per customer). All you need to do is enter your measurements every week in our diary at to keep track of your progress.

We kindly ask you to take a picture before and after the treatment, with the product applied, to make sure you have used it correctly. Please include a ruler placed on the penile column pointing towards the tip of the penis on both pictures.

If you are ever without Internet access, simply let us know that you won’t be able to submit your results at that time.

Please note: Every SizeGenetics™ device is disinfected and delivered to you in a sealed plastic bag. Once this bag is opened, your device cannot be returned or refunded unless you are requesting a refund under our money back guarantee terms above.

Choosing SizeGenetics™ is risk free – we guarantee you will extend your penis length (quickly and safely) or we’ll give you your money back!

SizeGenetics™ Doctor's Endorsements

Doctor Jorn Siana

Dr. J. Siana
Specialist in General and Plastic Surgery.
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Doctor Finn Knudsen

Dr. F. Knudsen 
Specialist in Plastic Surgery.
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