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What I Liked and Didn't Like About the SizeGenetics

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Updated on March 17, 2020

The SizeGenetics Penis Extender Set

So now you know that a good fraction of girls simply care about penis size, and you're looking to make some gains.

You have a basic idea of what it's like to wear an extender and you're looking to get one for yourself.

Over the past 8 years, we've tried several male enhancement devices including 2-3 different penis extenders. Other than the Bathmate, all of these devices were pretty underwhelming and difficult to wear.

At the end of January 2012, I decided to try the Sizegenetics extender because it had a money-back guarantee and promised "no slippage" or "pinching," which was the biggest problem with the o ther extenders. Perhaps more importantly - my friend Mike said it works fairly well.

As of this review (May 2016), in 7 months, I've gained about .7" of length.

If you are new to PE, you will likely gain double this amount in the same amount of time (newbie gains, similar to bodybuilding).

Let's learn how the SizeGentics penis extender works, but more importantly, what you can expect from it.

How the SizeGenetics Works

In short, this penis extender, like many others, works by applying moderate tension on your penis throughout the day. It keeps your flaccid penis "extended" and prevents it from naturally retracting.

The tissue is gradually stretched and broken down overtime. With adequate rest periods, the penis tissue* rebuilds itself and becomes stronger and specifically - longer.

This is similar to the hypertrophy (growth) created by resistance training (lifting weights) on skeletal muscle. However, the actual process is that creates lengths gains is actually called hyperplasia - not hypertrophy.

Penis tissue is made of 3 types of tissue (some parts include muscle and organ tissue), however, the majority of the tissue is made up of something called "smooth (spongy) muscle tissue".


Several reasons, i want to give you specifics. If you've tried other extenders, you'll probably know what I'm talking about.

There's pretty much only one requirement for results:


If you manage to drink 5 beers every single day, you'll successfully become an alcoholic.

If you train for 3 hours everyday on the basketball court, you'll have the potential to become an NBA athelete.

The point is, if you put in the correct amount of work every single day, you'll have no choice to succeed.

Luckily, penis stretching training is not difficult like sports training, so the only "challenge" (if you even want to call it a "challenge") is that you have to just wear the device every day for four hours.

If the device is comfortable, then this task becomes child's play.


The first penis extender that I tried was a generic one with a strap.

Although this generic penis extender had a strap, not a noose, there was quite a bit of pinching.

Remember, you will need to consistently wear your extender device for several hours a day.

Although this generic penis extender had a strap, not a noose, there was still considerable pinching.

I previously owned the Pro Extender (penis secured with a noose). These were not very comfortable and it became a pain in the ass to use them.

Both of these extenders kept falling off - not a great thing if you are sitting in class or the middle of a work meeting and it falls down the side of your pants leg.

Additionally, this generic extender kept pinching my dick. After 2 months, both became too painful to wear for more than 40 minutes.

I also used drink a gallon of water a day for bodybuilding, and it was completely annoying to remove and reattach these uncomfortable devices, especially in a public bathroom.

Add that stress onto the fact that I had to prevent the extender device from falling into the toilet or dropping on the filthy floor - just totally unnecessary stress that really added up.

Driving and climbing stairs became nearly impossible. I ended up selling the Pro Extender.

SizeGenetics Results

Remember, in order to get significant results, you need to wear the Sizegenetics for at least 4 hours a day. 8+ hours is even better.

Ideally, an extender will be part of your lifestyle. Not a hassle.

You need to be able to quickly take it off and put it back on after you use the bathroom. If you use the bathroom at least twice a day, and considering you have to wear this device for a few months, that really adds up to a lot of potential time and hassle to avoid.

It should be comfortable when you are walking around, driving, sitting or even when you bend over. It should not be pinching your dick or slipping off. Pinching and slippage are painful. You don't want it to begin to hurt as your studying, or with good company.

After sex, masturbation or following manual exercises, it's important to wear your extender to prevent 'turtle dick'. The last thing you want to do is put a painful, restrictive device on it.

Comfort is super important. I can't emphasize that enough. Even the most dedicated guys can't wear a device that begins to hurt after 10 minutes.

That's beause our initial response to pain is to "take it away", not tough it out.

While it is possible to "tough it out" when you can dedicate focus and brainpower to the pain, like in weight-lifting or beating the stress of hitting a work deadline, this is completely not true for passive behavior.

This extender is a pretty comfortable penis extender device - at least much better than the generic ones.

I'm wearing it right now as I'm typing this review, drinking green tea, frying some salmon and watching Game of Thrones. How's that for multitasking?

So what's one reason the SizeGenetics is a step up from the generic ones?


This is largely what makes it so much more comfortable than the generic extenders.

Sizegenetics has a soft plastic strap, similar to the PhalloGauge Model S extender that holds your penis in place without slippage or pinching. It keeps a consistent amount of tension on your penis and you do not have to adjust it until you take it off.

The problem with the other extenders I owned was that the "nooses" were always either too tight (pinching) or too loose (slipping).

These nooses would always dramatically stretch out after just a few weeks. When they stretch - they don't hold your penis as well. This causes significantly less tension to be applied and ultimately your penis will always "slip" out. After the bands stretch out and can't secure your dick, the system is basically worthless.

Using Extra Padding (Only Comes with the Full System - extra $$$)

The SizeGenetics penis extender can come with extra padding for the area that holds your penis. For extra cash of course.

The SizeGenetics Penis Extender Comfort Strap

For me, I think that the extra padding is essential to comfortably wearing this device. So it's a little questionable why they deliver it seperately and at an extra cost.

So if you're planning to buy the SizeGenetics, you definitely need to buy the extra padding - this bring the total cost to $349.95 before shipping and taxes. Ouch.

That price tag immediately scares a lot of guys away - make no mistake, $350 off the bat is a big investment, and a big risk to take.

The other extenders have a cheap plastic piece that holds your penis. Your penis naturally adheres to this piece which makes taking it off pretty painful, especially after wearing it for 2+ hours. It felt like taking a band-aid off an open cut. It was always a short, quick, acute pain- definitely not pleasant.

Nothing like that with this extender- easy on, easy in and easy off since your dick is surrounded with padding.

From feedback from the rest of the team and others, if you are uncircumcised, you pretty much have to purchase the extra padding (the full system).

What to Expect

Given you're consistent with it's use (4-6 hours a day, every day), SizeGenetics extender produces 1" gain in 6 months.

In this clinical study, participants gained an average of 1" in their first 6 months.

You can expect permanent length gains over several months if you legitimately put in the time and use it. No "ifs", "ands", or "buts".

Also, you can learn to add about half an inch on top of your length gains just from losing fat from the abdominal and pubic region.

See, considering all the tools and methods at your disposal, penis enlargement is definitely within every man's grasp.


UK board certified physicians and plastic surgeons tested the Sizegenetics extender and published the results in the March 2009 edition of the "British Journal of Urology International."

logo for the British Journal of Urology International

A summary of their results is as follows:

  • 6 month average growth = 1 inch (2.3 cm)
  • 12 month average growth range = 1 inch to 2 inches (2.55cm to 5.1cm)

This finding is what really legitimized the penis enlargement industry: After 6 months of using the penis extender, the men saw an average size increase of 1 inch (~2.3 cm) which was considered statistically significant by scientific journals.

Now at 12 months, the men averaged a final growth between 1 and 2 total inches (2.55cm and 5.1cm). The main variable was how long the individual actually wore the extender each day. One good thing that was consistent with all subjects was that they all wore it for at least 4 hours.

Basically, the longer you wear the penis extender, the more length gains you'll achieve in the long run.


Everyone asks this question so I won't completely duck away from it.

But we now know that penis extenders are scientifically proven to work.

These are predictions for how much you will gain, based on the data, provided that you are wearing it at least 7+ hours a day, 6 days a week.

If you're completely new to penis extenders:

  • 4-6 months = .75 - 1 inch
  • 6-10 months = 1 - 1.25 inches

Perhaps more. Perhaps less. If less it won't be that much less than these numbers above. If more, it won't be that much more.

It will depends on how much you wear it (and genetic factors).

If you've already gained about an inch:

  • 6-12 months = .5 inch
  • (If you have never really focused on length with regular stretching exercises, you will gain as I did .5" in about 6-7 months)

If you've already gained 1.5 inches in length:

  • 10-12 months = .25" inch
  • I don't necessarily recommend this device if you have already gained 1.5", you will have to do more aggressive things to get to 2 inches.

Again, all of this is provided that you actually wear the penis extender for 6-7+ hours a day, 6 days a week.

If you combine the manual exercises (jelqing - , a common stretching exercise) with Sizegenetics, you will gain even faster.

There's really nothing that will give you permanent gains faster than this combination.

censored results of using a penis extender

To see the uncensored photos above, click here.

Or if you want more results from all extenders, go here.

Final Verdict

But hands down it's a worthwhile one.

That's because you only have one penis in your lifetime, and if you can make it the best one possible - that is incredibly invaluable.

Both the PhalloGauge penis extender and the Sizegenetics Penis Extender work great if you are committed to using them we wouldn't be recommending any of them if they didn't work or if they didn't make our penises bigger.

If you're looking more for a detailed review of all extender devices, check out that comprehensive review.

If you have any questions regarding Sizegenetics, you are welcome to post below - I'll be happy to try and answer it for you.