What makes this penis extender the best?

The Size Genetics extender is the original penis extension device. Penis stretchers are also commonly referred to as penis extenders/penile extenders and penis extension devices but they all mean the same thing. It can help extend the penis by inches. When the Size Genetics extender was first launched over 16 years ago, the device only option was all that was available,  however, before long the “Ultimate System” was also added. They key difference  between the two is that the “Ultimate System” comes with a series of bonuses that make it excellent value for money. Many of these bonuses are exclusive to Size Genetics which gives it a significant advantage over its competitors.

Size Genetics Extender (Ultimate System)

How does the Size Genetics extender work?

The Size Genetics extender uses traction to naturally make the penis larger – both in length and girth. Traction is a clinically proven technique that is guaranteed to increase the size of your penis, by utilising the human body’s natural ability to grow and change. If a certain part of the body is exposed to a constant stretch, the cells in this area begin to divide and multiply, thus increasing the tissue mass.

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Why use the Size Genetics extender?


  • It can extend the penis by inches
  • The Size Genetics website also features before and after pictures of men who have been using the device.
  • It may also help you achieve harder, longer lasting erections.
  • It is recommended by surgeons worldwide who perform penis enlargement surgery.
  • The device is CE certified and classed as a Medical type 1 device with safety and efficiency assessed under the Medical Device Directive.
  • It has been extensively clinically tested and available for men of virtually all ages.
  • It is endorsed by doctors and used by surgeons worldwide.
  • It is supported by a clinical study conducted by the British Journal of Urology that discovered that a penis stretcher can increase penis size by up to a third.
  • It can help boost self-esteem and confidence in the bedroom
  • The Size Genetics penis stretcher was featured on British chat show The Jonathan Ross show where he described it as the “rolls royce of penis extension devices”.
  • Very fast distribution from the UK and the US so you won’t have to wait long on your device.
  • The Size Genetics Ultimate System comes with various free bonuses like the free PenisHealth™ penis exercise program and free LoveCentria™ sex technique book among others. Check out our table at the bottom of the page for the full list.
  • Should you decide that you are not happy with the device then there is a 6 month (180 day) guarantee and they have excellent customer service and aftersales experience.

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Does the Size Genetics extender work?

Yes! The Size Genetics device is based on the traction principle that has been around for centuries. It was once a primitive method used by tribes all over the world to increase the size of lips, ears and necks as part of their cultural traditions. Today the same principle is used by orthopaedic surgeons to correct uneven limb length such as leg length discrepancies.

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Is it comfortable to wear?

Size Genetics have realised that in order to wear a penis stretcher for long periods of time then it must be comfortable to wear. The longer you wear the penis stretcher then the better you’re gains will be. With this in mind they have developed the 16 way Ultimate Comfort System which means the device can be worn 16 different ways.

The Size Genetics device also incorporates MDA technology (Multi Directional Angling) into their design which allows the device to be worn at different angles to best suit you. Most other penis extenders only offer the one position to wear their extender which may not suit all penises. The Ultimate System also comes with various bonuses such as Traction Plus Powder and Revita Cream that you may use for added comfort.

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Is the Size Genetics extender medically endorsed?

Yes, as we stated above the Size Genetics extender is medically endorsed by doctors and surgeons worldwide. It has also been clinically tested to ensure its efficiency. Also, the British Journal of Urology has carried out an independent study which proved a penis stretcher can increase penis size by a third.

Penis Extenders Do Work

Also, please see the link below:


Does it come with any bonuses?

The Size Genetics Ultimate System comes with numerous bonuses such as:

Product Image
Comfort Accessories16 Way Comfort Strap and Velcro X Strap - Thanks to these comfort accessories the Size Genetics extender is the most comfortable on the market today which means it can be comfortably worn for hours, therefore potentially speeding up the gains.
Penis HealthFree Penis Health DVD - When you buy the Size Genetics Ultimate System you get free access to Penis Health. Penis Health is a free male enhancement exercise program. Penis Health can also help increase penis size and erection strength. Penis Health prices ranges from $54.95 to $95.00 to buy on its own so this added bonus is another reason why we rated Size Genetics our number one penis stretcher.
Traction Plus Powder2Traction Plus Powder/Revita Cream - Enlarging the penis can be tough on the skin of the penis sometimes, but Size Genetics include two additional bonus products designed to help protect the skin of the penis called Traction Plus Powder and Revita Cream. We have not seen other penis extender manufacturer that take this into consideration.
WipesDevice Wipes - Hygenic device wipes are provided to ensure the penis stretcher is kept very clean. It works on the most sensitive part of a man’s body so it is crucial to keep it clean.
Spare Parts 3Spare Parts - Size Genetics provide spare parts for the penis stretcher that can be used to replace parts that may wear down over time or to simply increase the length of the device should you come to need it.
Seduction and Fitness E-Books - Large database of online sex guides packed with videos, advice on how to satisfy your lover and various other interactive features.
Aftersales Support - Should you have any issues with your Size Genetics device then help is only a phone call or e-mail away. The support staff are excellent and are trained to provide the best support possible.


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Does it come with a guarantee?

The Size Genetics extender comes with a 6 month (180 day) guarantee. If you try the device and see no improvement or simply don’t like it then return it and get your money back. Many other manufacturers offer guarantees but they are rarely as long as 6 months. Size Genetics also have an excellent customer service and aftersales team. It should be noted that while the Original Size Genetics Device (Device only) and  the Ultimate Package come with a 6 month money back guarantee, the budget package is excluded from the guarantee.

Get an Exclusive $50 Discount

On the checkout page enter your discount code to receive $50 Discount

Discount Code: WORLD50

Size Genetics is currently running a promotion where if a customer sends their before and after pictures they will get a complete refund. NO other penis stretcher manufacturer is currently running this type of promotion.  This is another great reason to choose the Size Genetics device over other devices.

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Size Genetics Extender Models

Size Genetics
Ultimate System
Size Genetics
Device Only
Starter Edition
Product ImageSize Genetics Ultimate SystemSize Genetics Starter DeviceSize Genetics Device Only
SizeGenetics DeviceTickTickTick
1” and 2” Elongation BarsTickTickTick
Comfort Pad and StrapTickTickTick
Instructional DVDTickTickTick
3 Sizes of Elongation BarsTickTickCross
58 Way Ultimate Comfort SystemTickTickCross
MDA Multi-Directional Angling HeadpieceTickCrossCross
3M Advanced Comfort PlastersTickCrossCross
Revita Cream MoisturiserTickCrossCross
Traction Plus PowderTickCrossCross
PenisHealth™ DVDTickCrossCross
Seduction and Fitness E-booksTickCrossCross
Device Cleaning WipesTickCrossCross
Luxury Leather CaseTickCrossCross
Lock and KeyTickCrossCross
Travel CaseTickCrossCross
  • The Size Genetics Ultimate System costs $389.85
  • The original Size Genetics device costs $350.00
  • The $50 discount code (WORLD50) applies to both of the Size Genetics packages above. The Ultimate System is especially good value due to all the free bonuses you receive.

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Size Genetics Ultimate System

We rated the Size Genetics Ultimate System number one in our reviews due to:

  • The excellent product quality of the device
  • It is medically endorsed by doctors and clinically tested
  • The Multi Directional Angling incorporated into the design that allows the device to be worn at different angles.
  • Is it very comfortable to wear for long periods of timedue to the 16 way comfort system
  • All of the free bonuses
  • Free Penis Health™ exercises. PenisHealth™ costs range from $54.95 to $95.00 but you get it free with the Size Genetics device.
  • Free Love Centria™ access
  • 6 month (180 day) money back guarantee if you are not happy with the product.
  • The numerous positive testimonials we have received from men who are using the device and the before and after pictures on the Size Genetics site of real users.
  • And last but not least the $50 (USD) discount code (WORLD50) on the original Size Genetics device and the Size Genetics Ultimate System.

Visit the website: Size Genetics