medical symbol



By Dr. Jeff Ferrara

Updated on August 9, 2018

The data from this study is courtesy of Thunder's Place, and all credit to this data goes to them.

How these results were set up for presentation.

The data points that were thrown out:

  • Any data that showed a length decrease of over 1 inches.

  • Any data that showed a girth decrease of over 1 inches.

  • Any data that showed a length increase of over 4 inches, as this most likely an untrue outlier.

  • Any data that showed a girth increase of over 3 inches, as this most likely an untrue outlier.

Why throw these out?

The simple fact is that these sort of gains from natural penis enlargement are completely impossible.

Since we know that this is a fact, we can be confident not to trust this data.

Think of it this way:

If these results were real - others would also experience them and penis enlargement would be completely mainstream.

However it's not.

The generally accepted results for length are .7 inches in 16 weeks, but you don't hear much about this.

That's why we're going to present these results to prove that claim and also have the many men that have experienced it to back it up.

Typical girth and length gains experienced by the general population.

Here is the first interesting graph from Thunder's.

girth vs length gains scatter plot

It shows that there are many men that experience a non-zero size gain when engaging in penis enlargement.

Why is this so powerful?

Many men overlook this fact and dismiss it as ordinary.

However, those that do are missing out a very powerful truth.

That truth is:

If you even try to do some penis exercises - you will gain something.

Here's another way of looking at the data above:

What if it were the case that penis enlargement, was in fact, impossible?

Then we would expect men to see 0 girth gains and 0 length gains.

After all, that is the definition of penis enlargement being impossible, right?

That means the graph above would instead look like this:

It would have all the points overlapped at the 0, 0 point!

In other words, you would have all the thousands of points centered on the 0, 0 mark on the plot, and it wouuld be a really dark blue there!

That just isn't so with this data!

Yes, it's true that some guys have gained more than others - there's no disputing that.

But the fact that the vast majority gaiend some size is an accomplishment in of itself, at least when asking the most polarizing question of all time: Does penis enlargement work?

Typical Penis Length Gains Experienced by Thunder's Men

Here's the Thunder's plot for length gains that men experienced after doing some form of penis enlargement.

length gain results after penis enlargement training

This is another interesting plot to analyze.

Let's first take the "zero-case", that is, if literally none of the men were to experience any gains at all.

What would the graph look like?

It would look like a completely flat horizontal line of data points, all algined with the y-axis of BFEL Gains = 0.

It would basically be saying that, "No matter what your starting size, you will have gained 0 after doing penis enlargement."

That is simply not the case here.

Looking at the plot, it would be safe to say that a vast majority of the men experienced 0.5 inches of length gain, or more.

One crucial thing to understand about these gains:

Granted, these numbers were reported at some point in time after doing penis enlargement.

However, the actual time after each report varied from man to man.

In other words, some guys may have reported their increase one month after doing exercises, and some may have reported a few months to a year after doing some sort of PE routine.

That would explain the great variance in the gains.

So while this data is not the best to learn how much you can gain in x amount of time, it is still reassuring that you will gain something if you just try.

That's the point we're trying to drive home, because when you know something is possible, there is literally nothing stopping you from accomplishing it (given sufficient motivation to actually want to succeed)!

Typical Penis Girth Gains Experienced by Thunder's Men

Alright, here is the last data plot from Thunder's:

girth gain resulst after penis enlargement training

Ah, the final crucial measurement when it comes to penis size: girth.

This data wouldn't be complete if it wasn't for this last girth plot.

So let's analyze the results.

It seems same trend is occuring.

Again, taking the "zero-case" (also known as the "null hypothesis") - if penis enlargement was impossible, then there would be zero gains experineced by the vast majority of the men.

This would be represented as a flat, horizontal line of points aligned with the 0 on the y-axis.

This is simply not the case, again!

Again, just like the length gains, the girth results are varied, but are non-zero.

It seems that at least 75% of the points showed a girth gain of 0.25 inches or greater.

When it comes to girth, small gains are actually a lot.

Any small girth gains are actually a lot when it comes to sex.

That's because girth represents how wide you can stretch your partner open.

The average penis is already naturally designed to stretch a woman wide open, so any small amount larger than that simply adds non-linearly to that pleasurable result.

Girth allows you to press on her vaginal walls more and stimulate her harder without trying as hard.

Quite frankly, a girth gain of 0.25 inches is actually really good and although it seems small, she will definitely notice the difference.

Just ask her.

Again, this is another fantastic, reassuring result for those that are still on the fence about penis enlargememt.

Some more importanat points to consider about the data presented.

This data does not tell what natural penis enlargememt techniques were used.

Just something to consider.

While we can be fairly confident that the appropriate length exercises and girth exercises were used, it wasn't disclosed exactly which exercises or routines were used.

Length gains are typically achieved with penis extenders and manual stretching.

Girth gains are typically achieved with jelqing and penis pumps.

However, the fact that the exact exercises were not disclosed creates a bit of a fuzziness on exactly what a guy should do for the optimal result.

This data was not provided in a secure environment.

Again, this is just the data that was harvested from Thunder's website.

This includes their articles and forum posts.

The results were provided by random men on the internet, so that makes the data less credible.

However, the best way to combat the lack of credibility is to have a large sample size, which is exactly what Thunder's has provided here.

This data does not show the time spans used for each male subject.

Most likely, a guy who experienced an inch gain, was doing PE longer than a guy who was only doing enlargement for a couple months.

This is common sense.

However, Thunder's did not explicitly say how long each data point conducted their penis enlargement routines for.

While it will be interesting to know how long each guy took, it will probably be reserved for a newer study in the future.

The Numbers That Have Been Reported

Here is the general consensus on the results from using penis extender devices.

You can expect to gain .7 inches in length if you use the penis extender for at least 6 hours a day for 24 weeks (6 months).

Another important point is that it doesn't matter if you use a rod-based extender like the SizeGenetics or a belt-based extender like the PhalloGauge Model S or the PhalloSan.

We know this is true because there were two clinical studies, one for the rod-based extender and one for the belt-like extender and both penis extenders yielded the same result: .7 inches in 6 months

Ok. Now that we have the numbers agreed upon by the scientific community, let's take a look at real photos of what this actually looks like.

Some Before and After Photos Showing Length Gain Results

Clearly, penis enlargement is no joke anymore.

a before and after photo of penis extender results - example 1

Click here to see the uncensored photo above.

a before and after photo of penis extender results - example 1

Click here to see the uncensored photo above.

a before and after photo of penis extender results - example 1

Click here to see the uncensored photo above.

There are also numerous testimonials on other penis enlargement forums, so you can rest assured that results are guaranteed (as long as you train properly).

Another way at looking at this data.

It may be hard to visualize the actual results from just the photos above because both the before and after results are zoomed in and focusing on the penis and doesn't show the to-scale visual difference.

To solve this problem, we created a proportional bar graph that shows you the results for the male subjects who sent these photos above.

Before and After Results for 3 Male Subjects After Using a Penis Extender

bar graph showing the before and after results of using a penis extender

The percentage gains of each of the following are:

  • 26% gain for the Los Angeles subject.

  • 48% gain for the New York subject.

  • 45% gain for the Orlando subject.

These percentage results illustrate an extremely important concept that not a lot of guys know:

You can gain more size if you're smaller rather than starting out large.

This means that the guys who are 5 inches or below have most to gain!

Look at the data.

The subject from LA who started out at 6.9" and ended up at 8,7", he only got a 26% gain!

Don't get me wrong - while that is still a lot, it still doesn't compare to the other subjects from NY and Orlando who got a 48% and 45% gain, respectively!

This conecpt is related to the "Newbie Gains" results in bodybuilding.

That is, a beginner who never hit the gym before in his life, will experience the most muscle gain in a given period of time, compared to the veteran competitive bodybuilder, who has been there for 10 years.

In other words, the veteran bodybuilder would have to lift for about 5 months to experience the same muscle mass gain as the beginner gym-goer who only trains for a month.

This is phenomenon that we already see in the "normal" body modification / health industry, so it's not surprising that we see it here in the penis enlargement industry.

How these numbers work in your favor.

The best thing about these results?

Every single one of these men gained size.

Again there's a huge overlooked fact, that once you understand completely changes your persepective on penis extender effectiveness.

Do the regimen, and you will gain some size.

What does this mean?

It means if you do a penis enlargement regimen and stick with it, you won't not gain size.

That means you will gain some size.

See, the data shows us that each of the three men gained size.

Sure, we can debate and conduct more studies on why men gain more size than others, but the simple fact is all of them gained size.

This is a big game-changer compared to 20 years ago where your best hope was "being born lucky."

Gone are those days.

Now, there's a clear path to permanent size, and just like anything worth getting in life, it takes some work and effort.

How to achieve the results shown above.

The first thing that you want to do is pick out a penis extender that you can rely on.

The single most successful determining factor for success with a penis extender is how likely you are to keep wearing it.

Make no mistake, this is the only factor.

See, we already know that for a given period of time, say 6 months, that the design will not affect whether you get more gains in this 6 months period, or if you'll get them faster.

That is, whether you choose to use the PhalloGauge Model S penis extender, the SizeGenetics penis extender, or the PhalloSan penis extender, it really doesn't matter in terms of actual size gains.

All factors equal, they will all provide the exact same gains.

But, how likely you are to wear each device - that is the biggest question, and biggest determining factor for your success.

See, what happens is, if you find a device uncomfortable to wear - you simply give up and don't wear it. That's because it's simply impossible to wear an annoying penis extender and do daily tasks without going insane.

See the bad ones will gnaw at your skin, and pinch the tip of your penis - who wouldn't go insane if they had to put up with this 6+ hours each day?

1. The Penis Extender Study was published by five doctors from Moscow, Russia

a Russian flag

This study used 50 men as subjects and were instructed to wear a penis extender device for 4 hours a day.

The Key Takeaways

  • The average erect penis length gain was .7 inches of the course of 16 weeks!

  • The results were officially considered statistically significant, using basic biostatistic principles.

  • The highest gain a man experienced in this study was 2.55 inches!

The Power of Newbie Gains

If you take the time to follow that link to the study above, you'll learn about something called newbie gains.

In a nutshell, newbie gains are the accelerated growth you experience when you start using a penis extender for your penis enlargement for the first time.

Newbie gains are not a new concept, nor are the exclusive to penis enlargement.

For example, they are also commonly experienced in bodybuilding and also genetically like in puberty.

2. The Penis Extender Study done at the Andromedical Clinic in Madrid, Spain

a Spanish flag

This study also made it into a few scientific journals, the most prominent being the Sexual Education Congress Journal.

The Key Takeaways

  • They, as found in the Russian study above, also found that the average penis length gain was .7 inches in 16 weeks.

  • The average length gain every month was .17 inches.

  • The more you wear the device, the more you'll gain - proportional gain up to a certain point.

  • A 28% length increase after 24 weeks of using the penis extender.

  • They found that the size gains were independent of age. This means whether you're 20 years old or 50 years old, you'll still make the same amount of gains in the same amount of time.

Age does not matter!

This is truly a remarkable finding from the study above.

Typically, our bodies become less capable with age. As a result, this has prevented us from doing some of the things that we wanted to do before we died.

Whether it's climbing everest, or participating in the LA Marathon, physical limits with age (and luck) have always been a barrier to physical success.

Even professional atheletes tend to hit their prime in their late 20s. Some end their careers even before that. Unless you're a rare exception like Michael Jordon or Kobe Bryant.

However, this study proves, that age is not a limiting factor for penis enlargement!

That's because penis stretching utilizes hyperplasia - which is the human body's natural response to forces exerted on tissues for long periods of time - which is exactly what is done when wearing a penis extender.

So whether you've just started dating, or have been happily (or unhappily) married for 20 years, you can still benefit from penis extenders.

3. The Penis Extender Study done at Jiaotong University and the Renji Hospital in Shanghai, China

Now, let's talk about the penis extender study done in Shanghai, China.

a Chinese flag
Jiaotong University School of Medicine Logo

The Key Takeaways

  • The average flaccid penis length gain was a whopping .84 inches!

  • The average erect penis length gain was an even more impressive 1.2 inches!

  • This study also reported that the all men safely used the device, and had no problems when using it.

I'd like to point out the doctor's conclusion on the safety of the penis extender device, because not only does this make it practical for every man to gain size, but that means the barrier to entry is practically non-existent.

Contrast this to something like penis enlargement surgery, which has an abysmal succses and mortality rate, and you've got a real game changer, not only for you, but for all men.

4. The Penis Extender Study done at University of Turin, Italy

Need more proof that penis extenders work?

Here's another study that was done by the University of Turin in Italy.

an Italian flag

The results for this study were so insightful that it made it into the British Journal of Urology International publication.

BJUI cover logo

The Key Takeaways

  • The median length gain of the men who participated in the study was .52 inches.

  • This study was interesting because they gave a questionaire to each of the men that completed the study. The postive results are summarized below.

The questionaire results. What did the men think about their size gains and their whole penis extender experience?

The questionaire consisted of 5 questions and each were answered with a scale rating of 0-3 or 0-4, depending on the question, where 0 was the worst response, and 3 or 4 being the most postive response.

Question 1 was about penile curvature correction which scored a 1.6 on an average of scale of 0-4.

Question 2 was about satisifaction with penis flaccid length which scored an average of 1.96 "acceptable improvement" on a scale of 0-3.

Question 3 was about satisifaction with penis erect length which scored an average of 1.96 "acceptable improvement" on a scale of 0-3.

Question 4 was about satisifaction with sex life which scored a 1.6 "acceptable improvement" on an average of scale of 0-3.

Question 5 was about satisifaction with the overall result achieved which scored an average of 2 "acceptable" on a scale of 0-4.

About this penis extender study.

This penis extender study was conducted by the Jiaotong University in partner with the Renji Hospital in Shanghai, China.

A complete report of this study can be found here.

Renji Hospital Logo - Shanghai, China Jiaotong University, Shanghai, China - Logo

The experimental setup

30 subjects were used as the data for this study. 30 subjects is a good number because most United States FDA efficacy trials for new medical devices on the market require about 20 subjects. And getting FDA approval is much harder.

Therefore, the number of 30 subjects is a great number for the purposes of proving penis extender effectiveness.

The subjects were also between the ages of 16 and 70 years of age.

The subjects were instructed to wear the penis extender for 9 hours a day.

Subjects were checked and measured once a week. The measurements were done on the dorsal side (top) of the penis shaft.

Shanghai, China panoramic

Shanghai, China 2016

The Hard Numerical Results of the Penis Extender Study

Ok, now that we know how this study was done, let's take a look at some of the actual numbers.

Below is a table documenting the size gains for the subjects.

Let's first take a look at the column labeled "Length of flaccid" because we know that penis extenders primarily target length.

The average flaccid length gain after three months was 2.1cm (9.2 - 7.1) - that's a gain of .84 inches!.

Now let's take a look at the column labeled "Length of erect".

The average erect length gain was a 3cm (12.3 - 9.3) - that's a whopping gain of 1.2 inches!.

The Conclusive Results of the study.

For the purposes of this study, they set the following rule.

The penis length of the subject must increase past 0.4 inches (1cm) no later than 3 months.

They found that all subjects succesfully met this criteria after the study was finished, and the success rate was thus, 100%!

This is great news for the general population because the data and statistics prove that if you closely follow a penis extender regimen, you too will experience the same results - there are no outliers.

Cultural Applications of the Traction

Penis stretching uses the "traction principle" which is also used in plastic surgery.

Here are some more notes from the result of the study.

The most interesting was that the traction method is not an entirely new concept - take a look at this quote below:

It claims that the traction principle, or the principle of stretching by holding body parts in a stretch position for long periods of time, are also applied in plastic surgery to achieve the desired "looks".

With a major industry as plastic surgery, we can be sure that the surgeons know that it works well and will continue to use it for years to come.

Combine this with this and other studies results, we can be extremely confident in using penis extenders to apply the traction principle.

Body modifications in other cultures.

The Study's Report on the Safety of Penis Extenders

Next are some reports on the safety of penis extenders. Their findings were quite positive.

This is very good because it is in stark contrast to penis enlargement surgery which has a poor success rate ~50%, and a very real, mortality rate that can't be ignored.

While penis extenders are less risky, they do take longer to achieve results, but if you combine the fact that they are extremely effective (100% success rate as mentioned earlier, for this study), and completely safe (no risk of death or injury), these devices are massively useful tools that will set you up for a lifetime of penis size satisfaction.

In Conclusion

The biggest conclusion to gain from this study is:

Do something, and you'll gain something.

The converse is also true:

Do nothing, and you'll stay the same.

Based on the data presented, most guys were able to achieve a .7 inch length gain and a .25 inch girth gain.

These numbers are nothing to sneeze at, considering that penis enlargement was once thought to be impossible.

So what do you think about this data?

If you're looking for a device that will do the hours of stretching exercises for you, you may be interested in our extender that thousands of men already use.

The PhalloGauge Team will answer all questions / comments you may have.

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