SizeGenetics Review – Does It Work?

By: Rob Miller
Fact Checked On: 1-29-2021

Note: This is just a review. Click here to visit the official Size Genetics website.

SizeGenetics Overview

As you might have guessed, one of the most frequently asked questions we get is “How can I get a bigger penis?” Guys want it for all different reasons, but I’d say it mostly boils down to confidence.

The knowledge that nobody’s going to be laughing at your little guy, in fact the knowledge that they might even be blown away by it, is priceless when it comes to sexual confidence.

Well, pills alone just aren’t going to do it.

You’ll need a device to go along with it.

One such device is an extender, like SizeGenetics.

SizeGenetics, like most penis extenders, is a device that you “attach” to your penis and wear for several hours a day to achieve gains in both length and girth (though the most significant gains will be achieved in length).

There are definitely differing opinions of SizeGenetics and extenders in general, so we’ll walk you through, making sure you know what you’re dealing with.

Note: If you’re looking to gain some SERIOUS size, then I would recommend you take a supplement called Vigrx Plus along with the Size Genetics device. The increase in blood flow and libido will SKYROCKET your gains.

How SizeGenetics Works

size genetics reviewAs a penis extender, SizeGenetics is a device that you put on/around your penis, causing it to stretch and then grow, enabling it to be longer both at rest and in a state of arousal. It works on the principle of traction.

After selecting the correct size to encourage a small amount of growth, you apply SizeGenetics to your penis, and wear it for several hours.

You do this each day, and over a number of months, you’ll add on to the size of the device because the size of your penis will continue to increase, requiring you to do so.

What Makes SizeGenetics Different

I know what you’re thinking. “You want me to wear that thing on my penis for hours each day?

Are you crazy?” And that’s why, frankly, tension devices haven’t taken the penis enhancement world by storm.

People who manage to use them do find success.

But most people find it simply inconvenient.

That’s why the makers of SizeGenetics made sure it was as comfortable as can be.

It comes with spongy cushions and tubes to increase your comfort, if you find it to be lacking.

They do this because SizeGenetics knows that it won’t work if you don’t use it.

SizeGenetics Reviews

We’ve seen a number of SizeGenetics reviews from guys who’ve used it, and they are mainly positive, giving us the impression that if you use it, it works.

The only complaint lots of guys share is that it’s something of an inconvenient hassle to have to wear SizeGenetics for hours every day.

Lots of guys hope that they can get away with using it less or for shorter periods of time, but you just can’t if you want to get the kind of results SizeGenetics is capable of.

There’s also a number of very convincing before and after photos showing some HUGE increases in size. Check them out below:

sizegenetics before and after

size genetics before and after pics

Click Here to see actual endorsements and testimonials from real customers.

My Personal Results

Back when I originally started this site, I kept coming across the Size Genetics device.

At first, I’ll admit I was a little intimidated.

The thought of strapping the thing on to my penis didn’t sound very appealing.

When I started to see the before and after pictures guys were posting though, I decided it might be worth a shot.

I ordered the comfort package, mainly because I was reading how important comfort is when it comes to extenders.

I received the SizeGenetics extender in the mail a few days later, and started wearing it right away.

Some initial thoughts:

  1. It wasn’t as easy to put it on as originally thought.

I had read a bunch of guys saying that putting on the SizeGenetics device was easy.

In my personal experience, this was not the case.

In fact, it took me about 45 min. to get it on the “right” way.

Luckily I’m a pretty patient guy, but I can see some guys throwing in the towel early here.

2. It’s not as uncomfortable as it looks.

At first glance, the SizeGenetics extender looks like you wouldn’t want to wear it for more than a couple of minutes.

After finally getting it on the right way, I noticed that it was actually quite comfortable.

It wasn’t like I didn’t notice I was wearing it, but I quickly because accustomed to the feeling.

SizeGenetics Pros and Cons

Advantages of SizeGenetics

  • It works for a lot of guys.

    If you use it diligently and especially in conjunction with enhancement pills, you should see growth.
  • There’s a 6 month money back guarantee.

Disadvantages of SizeGenetics

  • It’s expensive.
  • It requires enormous commitment.

    We’re talking about hours of daily use for months and months.

Where to Buy

SizeGenetics is available online through the SizeGenetics website.

There are a few different packages to choose from based on your goals and budget.

The starter package includes only the SizeGenetics device, and it sells for $199.99. There are more expensive packages if you want the carrying case, powder, and several more add-ons.Whichever package you choose, you’ll be eligible for the 6 month guarantee.


There are two things to remember about penis extenders.

One is that they provide a degree of success when it comes to penis growth.

The other is that they require a huge and extended time commitment.

SizeGenetics tries to mitigate that second fact by being as comfortable as possible.

The feedback we’ve seen seems to support that.

So if you’ve been thinking about trying out an extender, SizeGeneticsis a good choice.

If you are confident that you have what it takes to stick with SizeGenetics or any other similar penis extending options and put in all of the work and attention that it requires, then you are more likely to have good effects and gains to show for it.

Have You Used SizeGenetics?

Leave Your Review Below!

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User Reviews

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User Questions and Answers

Can you use both devices, such as the SizeGenetics and Bathmate, during the day or is that too much for the penis to handle? -Carmine

You can use them both, but you'd have to make sure to work out a schedule that doesn't end up just making you sore. When you're sore, you're less likely to work at it consistently.- Rob

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9 out of 10 people found this question helpful.

If I just want to grow 2 inches should I use the sizegenetics or the bathmate -Jay

Well, that depends.  If you're looking for girth, use the Bathmate.  If you're looking for length, use the Size Genetics device.  Personally speaking I would get the bathmate and do jelqing exercises along with it.  That way you get the best of both worlds (i.e. length and girth increase).- Rob

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8 out of 10 people found this question helpful.

How many hours a day does size genetics take? -kyle

You'll want to use it for several hours a day, the more you wear it, the quicker you'll see gains.- Rob

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5 out of 6 people found this question helpful.

Some places online say to use SizeGenetics 4-6, 8, 9, 10, 12 hours a day. The DVD doesn't say.What do the clinical studies say? -kyle

Generally speaking, the longer you use it, the better your results. There have been a couple clinical studies. Men using it for 5 hours a day increased, but at a lower rate than those who used it for 10 hours a day.- Rob

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3 out of 3 people found this question helpful.

I have been on medication for twenty something years for High blood pressure and Diabetics nothing ever works for me I tried to be bigger and along with the confidents. -preston rainey

You should be able to use SizeGenetics with your issues.- Rob

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2 out of 2 people found this question helpful.

i jst want 2 make my dick long wich is good fr me and no side effcts fr me -bunty

Try the SizeGenetics.- Rob

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3 out of 4 people found this question helpful.

How big or wide long can penis get -Leonard

It depends on where you start from. You should be able to add an inch or two with hard work and consistency.- Rob

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2 out of 2 people found this question helpful.

If I average say 5 hours a day size genetics, how long will I get? -kyle

Studies show that you should reach about 3/4 of an inch of length gain after about 6 months at 5 hours a day.- Rob

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2 out of 2 people found this question helpful.

I've seen places say 1 cm, 1/2 inch, 1 inch past fully outstretched, erect. which is it. I ask cause my erect length is significantly longer then fully outstretched flaccid. My flaccid state is something over 3 inches. Size Genetics set at 4. Is this an ok start for now? Thanks for your time. -kyle

There's really no set amount of growth that holds true for everyone, which is one reason why you see different numbers. Your setting sounds about right. You want to make sure you're comfortable enough to wear it for hours, but still with tension.- Rob

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1 out of 1 people found this question helpful.

The Internet says to use SizeGenetics everyday for up to 12 hours. Is that 12 hours with or without breaks? -kyle

It's meant to be used without breaks.- Rob

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1 out of 1 people found this question helpful.

do I take 10 15 or 20 min break every two hours? should I take a day off every once in a while? sizegenetics -kyle

It's recommended that you keep it on for several hours at a time to get the best and quickest results.- Rob

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1 out of 1 people found this question helpful.

Will I gain gains flaccid, stretched, and erect. combination. or all above sizegenetics -kyle

With a device like SizeGenetics, the focus is flaccid growth, but that translates to erect and stretched growth as well.- Rob

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1 out of 1 people found this question helpful.

please can i combine both sizegenetics and vigrx together.. im 5.7 and i really want to increase girth,, thanks -afolayan

You can.  In fact, the increased blood flow caused by the VigRx Plus will help along the progress you get from the SizeGenetics.- Rob

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I've been taking enhancement pill for awhile. I get really hard erections but no bigger in size -Jason

That's right.  Enhancement pills improve performance (erections), but to increase size, you should use an extender device like SizeGenetics.- Rob

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thumb screws on size genetics adjust tension. closest to base less tension, farther from base more tension? what are hexagonal bars for. not elongation bars. I don't see any lines. how do I know whether it's on.600 grams of tension or 900 for example. and how hi does it go. if my erect length is 5.3. should I extend device to 5.8 or what -kyle

I think this instructional video should help. Here's a link: Rob

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is it ok to wear size genetics 5 and a half hours straight -kyle

Yes.  You should leave it on as long as possible, up to 12 hours at a time.- Rob

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If I lose track of time and wear size genetics for more than 12 hours will results slow,  deteriate,  decrease, or stop? Are there any adverse or negative bad side effects? Thanks for your time. -kyle

As long as you continue to be comfortable, it's fine. The 12 hour top of the recommendation is there to make sure you don't get too uncomfortable. If you do, then take it off. But other than potential discomfort, there's no problem with more than 12.- Rob

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Will it be ok to masturbate or have sex before or after size genetics? Should I give some time and wait, or abstain completely for next however many months? Will masturbation and sex slow stop diminish or stunt gains. any bad negative adverse opposite side effects. Thanks for your time. -kyle

It's totally fine to continue having sex and masturbating while using the SizeGenetics program. It won't slow or stunt your growth, and it won't cause any side effects.- Rob

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I added 1 inch elongation bars to sizegenetics. does that maybe mean I've made gain -kyle

Probably.  You should always take measurements before you start the program. If you haven't yet, make sure you do now, so you can track the progress you make from now on.- Rob

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I just watched size genetics video on video it says don't change tension till week 6. I have since day one. do you think I 'll be ok -kyle

If you just started using it, go back to the original, unchanged tension. If you've been using it this way for a couple weeks already, then leave it the way it is.- Rob

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Im online looking for safe site to order half inch elongation bars. my set up came with 1 inch and 2. size genetics value edition -kyle

If you go to the SizeGenetics website, scroll down to the bottom, and click on Spare Parts. They sell separate elongation bars.  Here's the link: Rob

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I've done some research online and the clinical studies that support and back penis extenders say erect gains of 1. something cm for example. erect. do you know if doctors that took measurements took flaccid stretched measurement and said erect length or if they measured erect or both. I'm going on three weeks and I'm pretty sure I'm seeing flaccid gains but not erect gains -kyle

I would have to trust that the clinical studies say about their measurements. I would have no way to know if they misspoke, but I would doubt it. 3 weeks is still very early. I would give it some more time.- Rob

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I went on scroll down to bottom clicked on spare parts. says elongation bars. but it doesn't say 1/2 inch 1 or 2. value edition set up already comes with 1 and 2 s. I want 1/2 inch bars. I don't want a pay 45$ to get something I already have and don't want -kyle

Yeah the $45 pack was all I saw too. Check out the PE forums. They may have some direction for you.- Rob

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I've been rapping my penis in baby wipes before I put on size genetics. after I took it off I noticed a white bump size of dime. could I have an allergic reaction to baby wipes or got an infection caused by irritation and friction. I'm seeing gains and I don't want a quit -kyle

My guess is you're having some sort of allergic reaction to the baby wipes, but I don't know for sure. My suggestion would be to lay off for a few days to let it heal, then retry without the baby wipes.  If you don't get the same reaction, reintroduce the baby wipes.  If it comes back, then you know that's what it is.  Ultimately, if the problem persists, you should look into using the Phallosan Forte instead. It's SO much more comfortable so you won't have these kinds of problems.  - Rob

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Is it safe to put on hydrocortisone or neosporin under sizegenetics? -kyle

It should be, but I would go with Neosporin. Long term hydrocortisone can thin the skin.- Rob

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I've added 1 inch bars and fully extended out size genetics bit it's to soon for two inch bars. so what do I do keep tension same for now or what. might be a long time before I can add two inch bars in place of 1 inch. what's option. can I still make gains as is. I do appreciate time -kyle

Yeah, stay with the tension that you have until you no longer feel it pulling - probably about a month or so. Then move up to the 2 inch bars.- Rob

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How can i buy it -Frankelly

You can order it through their official website. Here's a link: Rob

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Author: Rob Miller

Supplement Critique

Rob Miller founded over 7 years ago, and has been the chief editor ever since. He has a diploma in Advanced Dietary Supplements Advisor, and worked at GNC for 3 years. He KNOWS supplements, both inside and out. Rob currently resides in Jupiter, FL, with his wife of 4 years.  Learn more about him in his Bio here. Follow him on Twitter , Facebook, LinkedIn, or find him on Google +.

56 comments on “SizeGenetics Review – Does It Work?”

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  1. Hay there Rob

    Rob here also so, I purchased a traction device a couple years ago and not even sure what name brand it but I’m sure their similar. Yes dedication is the name of the game here after 1 month I’ve seen a difference and excited about the final outcome.

    I’m using it cold turkey so to speak although it can be uncomfortable and should do as little climbing and bending over otherwise ouch. You don’t have to wear it forever so just suck it up, the other drawback with the device I’ve got you must snitch it up tight which cuts the circulation off probably by 50%.

    Have you any ideas which may help? Thank you for all the exercises videos and help……..the wife will love you also lol.

    1. Hey Rob,
      Yeah see that’s why I’ve been recommending the Phallosan Forte (review here) for this specific reason…it doesn’t cut off circulation like traditional extenders do. You’re in luck though, there is hope. Check out this Modified vacuum extender:

      It’s basically an accessory for SizeGenetics and other extenders, that completely eliminates this problem. Hope this helps and let me know if you have any questions.
    1. Hey Dave,

      They’re not recommended for anyone under the age of 18. The primary reason is that you’re still growing, and it’s not known what effect it might have on your natural growth.

  2. Which product will increase girth and length in permanent basis? How long will it take to see the result and should I keep on taking product after seeing result?

    1. Hey Kiran,
      Go with both the Size Genetics extender ( and the Bathmate. Using both combined will give you permanent length AND girth gains. Typically you’ll start to see initial results in the first couple of weeks, and the best results are seen around the 6 month mark.

      Here’s my review of the Bathmate:

      Hope this helps and let me know if you have any other questions.

    1. Hey Kyle,

      Yeah, you can try that. I’ve heard of guys using baby wipes as well, but the solution on them could possibly cause irritation.

      It can get pretty uncomfortable, so pretty much whatever you can find to make it better would be fine.

  3. I have value edition size genetics device. I’ve watched video. and I’ve seen something about lines on bars.

    I don’t see any lines. so I’m not sure wether it’s at 600 g or 900 etc for example. I don’t know if it goes up to 2500. if I can adjust 100 200 300 vs at a time or what

  4. What’s your views on HGH factor and xanogen when is the best time to take HGH and also with do I think about sinrex
    1. Hey Nick,

      First off, you’re not going to get penis enlargement from any pill. I’d stay away from Xanogen and HGH Factors. They’re advertising is just pretty scammy. Sinrex looks good for performance enhancement, but don’t count on it to grow your penis.

    1. Hey Angel,
      Anecdotally, there are stories of guys getting as much as a 2.5 inch gain in size. I didn’t get this because I didn’t wear it for as long as those guys did.

      However, If you stick with it, there’s no reason you couldn’t achieve the same gains in size.

  5. Hey I just wanted to know that is it bad if I but these products and use them if I’m only 16? I want to get somewhat big for confidence and I just wanted to know.

    1. Hey Joe,

      Yeah, these products are not recommended for anyone under 18, and I would recommend waiting till you’re a little older than that even. You don’t want to do this while you’re still have the potential to grow naturally.

  6. Hi rob i wanted like to know that if i combine the vlc tugger head piece with the sizegenetics will i get the same results because im uncut. Thanks.

    1. Hey Max,
      Yeah you can definitely do that and the results should be the same. Keep me posted on your results!

      1. Thanks. I would also like to know that if i buy the bathmate will it show on my invoice what i bought, because the place where it will be delivered for me will need an invoice from me in order for me to claim it.

        That would be embarrassing if it showed i bought a penis pump. Thanks again.

        1. Hey Max,

          Bathmate is delivered in a plain brown box. The invoice and the credit card statement will say “Umproducts”, so you should be safe.


  7. I want to gain size and i have been doing a lot of research on all pillls and extenders but there are 100s of pills and i don’t want to pay a lot of money to gain size what would you recommend?

    Healthy diets, excersizes, pills and extenders i need to know
    my girlfriend has made a comment to me before about how her ex was huge and its made me feel weak about myself and i don’t know if i actually please her in bed i can make her orgasm but i want a more intense reaction
    1. Hey Brian,

      SizeGenetics is your best bet for significant length increases, but it does take serious commitment in terms of time and money. For size gains without spending tons of money, go with the enhancement exercises in my free penis enhancement ebook along with VigRx Plus.

    1. Hey Virgil,

      You’re fine. The SizeGenetics device was originally tested on guys with penises as small as an inch.

  8. Hey rob,

    I wonder is it really work as my penis will shrink in a day…when i put it on….will it slide out? and is there a minimum flaccid size required for wearing it ?

    Also, whats the difference between sizetrac and it ?
    1. Hey Jay,

      Sizetrac and SizeGenetics are pretty similar in that they work the same way. It’s really a matter of preference. I liked SizeGenetics, and the reviews are really quite good. It’s adjustable so you should be good for the size of the device. And no, the gains you get will basically be permanent once you get them.

        1. Hey Jay,

          It should. Any male enhancement supplement that works will help move the enlargement process along.


    1. Hey Langston,

      That’s right. Don’t expect 3 inches in a month of anything, but yes, you should get noticeable results.

  9. I can see that sizegenetics will work but its very expensive ,
    What is other option for length and girth that is affordable ?
  10. This thing is a piece of junk. I constantly slide out of it. It may stay on better if you’re already hung, but if you shrink too much you slide out. Once you begin sliding out, it puts a lot of strain on the head because it’s being squeezed thru backwards. I did notice it made the head mushroom out more from being pulled backwards. I’m very unhappy with it. It’s extremely difficult to put on and pinches the sides. It comes with different comfort holders, the only one that mildly works is the foam cylinder, and the foam agitates the head by rubbing against it when sliding out.

    I got a Bathmate afterwards and could not be happier with the Bathmate. I’ve gotten great compliments from the Bathmate results. I use the Hydromax X40.
    1. Hey Jeff,

      If you use it according to the instructions, you’ll be fine. But like any mechanical apparatus, if you aren’t careful with the tension or the activities you perform, you could experience pain or discomfort.

  11. Hi rob, I wanted to know that if a person is uncircumcised can the still use the size genetics and still get great results or will it be a hassle. Thanks.

    1. Hey Damien,
      From what I’ve ready, you just pull the foreskin back before putting on the device, and all is fine.

  12. hi Im trying to contact sizegenetics customer support and everytime I call it says call is blocked. I also would like to know is sizegenetics in the U.S or another country?

    This is the number I dialed 115- 979- 8446 is that the right one or did I forget something. please help I want this product so bad im doing a whole body makeover and while I work out my body I would also like to work out my unit as well. Thank you.

    1. Hey Damien,
      Size Genetics is a British company, but they deliver to the U.S. as well. The customer service phone number depends on what country you’re calling from. In Britain, it’s +44(0)115 979 8446. In the US, it’s 1-800-209-1670. In Australia, it’s 1-800-047-153. If you can’t get through with a phone number, you can email them at Best of luck with your transformation, and keep in touch.

  13. Can you just wear it at night while sleeping? Also how would u wear it throughout the day without it being noticeable to anyone else?

    1. Hey Larry,
      The more you wear it, the better and faster it works. You could use it just at night while sleeping, but you’ll get better results if you wear it more.

      They’ve designed SizeGenetics to be the most comfortable device there is, and realizing that every guy is different, there are 58 different ways to wear it. So everyone can find a comfortable position.

      It’s also made small and discreet enough that you can wear it under your clothes at work, and no one will know.
      Let me know if you have any more questions.


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