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SizeGenetics Reviews: Will it really work for penis enlargement?

We test and study whether SizeGenetics will give you the size advantage you’re looking for

Last Updated: Jan 4, 2022
sizegenetics reviews

If you’re insecure about the size of your penis, you’re in good company – studies show that men of every age and extraction are nervous that their equipment doesn’t measure up to their peers’. For a lot of people, it creates a sense of dread that you really ought to be bigger, or else your partners will be left sexually unsatisfied. It doesn’t help that this insecurity is reinforced by media, cultural mores, and even other men (who are also insecure).

Scores of people are turning to cosmetic and therapeutic medications and devices with the hope of enlarging their penises, and there are about as many touted enlargement techniques as there are men looking for them. A whole lot of companies are just trying to sell you a bill of goods, unfortunately, while some of them are the genuine article and will actually help you to permanently increase your penis size.

SizeGenetics is one product that claims it can help you lengthen, thicken, and correct the curvature of your penis, and even help you achieve harder erections. But can you trust them? Does this device work? We’ll give you the lowdown.

Review Summary


  • FDA-approved
  • Safe and effective
  • Comes with instructional DVD
  • Can be worn throughout the day
  • Sturdy and well-made


  • Requires extensive use
  • Might snag pubic hair if untrimmed
  • Metal bars can be uncomfortable
  • Heavier than some competitors’ devices

Bottom line

Based on our testing of SizeGenetics’ products, we can recommend them for both medical and cosmetic use. SizeGenetics actually works in increasing the size and hardness of your penis if used correctly for a consistent period of time – we’ll explain why below. SizeGenetics’ devices have undergone thorough quality control measures to ensure that they are both effective and safe to use. They’re also useful for men suffering from Peyronie’s disease, which causes painful curvature of the penis, as well as men experiencing erectile symptoms as a result of prostate surgery, allowing the user to both adjust the curve of the penis and increase the hardness of erections. SizeGenetics is neither the least nor the most expensive penis extender.

Our Top Picks


SizeGenetics is a trusted and scientifically backed option for men who want penis enlargement but don’t want to go under the knife.

There are many customized solutions offered as both individual products and packages that take into account your desired effect and daily routine. With a money-back guarantee, SizeGenetics’ proven method promises results.

Value Edition
Reviewed by Innerbody Research
Comfort Package
Reviewed by Innerbody Research
Curvature and Peyronie's
Reviewed by Innerbody Research
Ultimate System
Reviewed by Innerbody Research

Why you should trust us

Innerbody Research recently celebrated its 20-year anniversary online. Over the past two decades, we have helped tens of millions of readers make more informed decisions involving staying healthy and living healthier lifestyles.

We extensively test each health service we review. We try our best to give you, our readers, an unbiased exploration of at-home health services, free of marketing jargon or gimmicks. We evaluate the service based on our adherence to quality, the latest medical evidence and health standards, and a simple question: would we buy the product or service ourselves if it weren’t part of our job, and would we recommend it to loved ones?

Additionally, like all health-related content on this website, this review of SizeGenetics was thoroughly vetted by one or more members of our Medical Review Board for accuracy.

What is SizeGenetics?

SizeGenetics has been around since 1995, and in that time, they’ve established themselves as a reputable and scientifically sound option for penis enlargement outside of actual surgery. They offer a range of penis extenders and accessories, both individually and in full kits, all of which come with a money-back guarantee if you’re not completely satisfied with the services they have to offer. There’s a range of versatility in their products, and SizeGenetics gives you the freedom to customize the exact penis enlargement routine that works for you.

Is SizeGenetics legit?

You can’t always be sure that penis enlargement therapies and products are going to deliver on their promises, but in SizeGenetics’ case, the answer to whether or not they can be trusted is a resounding “yes.” The devices take advantage of penis traction, a proven method of enlarging and strengthening penis tissue by stretching it with the use of suspension devices that hold it in place while your body enacts the same cell regeneration processes at the heart of weight training. Traction doesn’t bring miraculous gains in short periods of time – it takes consistent use and patience, but if you stick with it for months, SizeGenetics pays dividends.

Does SizeGenetics work?

SizeGenetics’ products are effective, especially when used in tandem with one another for a long-enough period of time to let the equipment do its work. To get the best results, it’s important to wear the SizeGenetics device for at least a few hours each day, and its subtle and intuitive design means you can wear the device pretty comfortably for much of the day underneath clothing without people knowing that you’re wearing it – unless your job is highly active or you’re rocking skinny jeans.

Many users report gains of up to an inch-and-a-half after eight months of use, and you’ll see short-term gains, too – the kits come with a measurement device that lets you keep track of your gains as they happen.

How does SizeGenetics work?

SizeGenetics’ penis extenders use a system of elongation bars and straps to create traction, which causes microscopic tears in the tissue of your penis over time. Similar to how your body builds muscle by repairing microtears after a workout, your penis also enlarges as your body repairs these microtears. SizeGenetics uses a “noose” that attaches to the head of your penis (which sounds much more intimidating than it actually is) and gently stretches it for a few hours per day.

A helpful rule of thumb is to set the initial measurement a centimeter ahead of your flaccid penis’ current length – you don’t want to jump into more strenuous stretches until your penis has gotten used to the device. The included comfort strap is the key to maintaining a minimum of discomfort.

Using SizeGenetics

After assembling the SizeGenetics using the instructional material included, you’ll have everything you need to get started. To begin:

  1. Place the basal ring around the flaccid or semi-hard penis, making sure that the indent in the ring is located on the underside of the shaft.

  2. Hold the device in one hand and use the other to hold your penis at full flaccid length.

  3. Loop the penis through the comfort strap or silicone tube and tighten behind the head of the penis. Do not add tension yet.

  4. Slowly rotate nuts on the device inward until it reaches the third mark or until you begin to feel discomfort. If further length is needed, add additional elongation bars and retry.

Using SizeGenetics devices is a fairly intuitive process right out of the gate. The sturdiness of the design is evident, engendering trust that it will not break at all. While it’s clearly well-built, SizeGenetics is certainly not the lightest-weight penis traction device.

How long until you see results?

While using SizeGenetics for 5-6 hours per day, most users report seeing a 10% increase in growth in the first two to three months. This isn’t necessarily long-term growth, however; continuous use over a period of six months has been shown to produce growth of up to 28% in length and 19% in girth. Using the device for several months is the key to seeing permanent growth in size.

Products and Prices

As you consider making a purchase, keep in mind that SizeGenetics is based in Europe. Because of this, shipping to the U.S. costs a flat rate of $19 – an unavoidable addition to the overall price.

Value Edition – $199.95

This is SizeGenetics’ most affordable package, and while it doesn’t have some of the accessories of more comprehensive packages, it has everything you need to get started:

  • SizeGenetics device
  • Product case
  • Dual-function front piece
  • Comfort strap
  • Protection pad
  • 2 elongation bars (1in/2.5cm)
  • 2 elongation bars (2in/5cm)
  • Quick start guide

Comfort Package – $249.95

This kit has everything included in the Value Edition and adds a few extras:

  • SizeGenetics device
  • A full, no quibble, 1-year warranty
  • Luxury leather case (w/ key)
  • Dual-function front piece
  • Silicone tube
  • Comfort strap
  • Protection pad
  • 2 elongation bars (1in/2.5cm)
  • 4 elongation bars (2in/5cm)
  • 2 elongation bars (0.5in/1.25cm)
  • No-slip Protech
  • 3M advanced comfort plaster
  • Quick start guide

Peyronie’s Disease Home Treatment – $299.95

This kit is targeted to users who suffer from curvature of the penis, discomfort from erections, lack of libido, and/or weak erections. It includes:

  • SizeGenetics device
  • Luxury leather case (w/ key)
  • Dual-function front piece (w/ extra)
  • Silicone tube (w/ extra)
  • Comfort strap
  • Protection pad
  • 2 elongation bars (1in/2.5cm)
  • 4 elongation bars (2in/5cm)
  • 2 elongation bars (0.5in/1.25cm)
  • No-slip Protech
  • 3M advanced comfort plaster (w/ extra)
  • Quick start guide
  • Gauze

Ultimate System – $299.95

This kit contains everything that comes in in the Peyronie’s Disease Home Treatment pack, and includes:

  • 3-pack of Zestra Essential Arousement Oils
  • Pack of Accellerate Cream Moisturizer
  • Pack of Accellerate Traction Talcum Powder

Is SizeGenetics safe?

SizeGenetics is perfectly safe and comfortable to use. The key to maintaining a healthy and pleasant penis-enlarging routine is to listen to what your body is telling you – if circulation to your penis is being cut off or you’re experiencing a level of discomfort beyond gentle stretching, recalibrate and try again. Gains won’t happen overnight, and it’ll take patience to see the big results you’re looking for, but as long as you follow the comprehensive instructions included with SizeGenetics kits, you’ll be in great shape.

If any problems arise as a result of using SizeGenetics, you can always reach out to their customer service team with any questions or concerns. This is another aspect of the company that separates it from fly-by-night outfits selling questionable products.

Privacy considerations

SizeGenetics does a fine job of protecting your personal information.

  • All shipments are contained in featureless boxes for thorough discretion
  • SizeGenetics will never collect or distribute any financial or personal details
  • Payment through website with card or PayPal is secure

How we evaluate home health products and services

At Innerbody Research, we customize our evaluation criteria depending on the type and nature of the health-related service or product. For SizeGenetics and other health products, we have five areas that we use for our evaluations, including:

Quality: How well does the company deliver its core service(s) to the customer? For testing services, does the company adhere to the latest and most advanced testing technologies and achieve a very high degree of accuracy? For non-testing telehealth services, is the quality of the service high enough that we would recommend it to loved ones without hesitation? If not, why not?

User-friendly: How intuitive and user-friendly is the service? Does the device, program, app, or website achieve a good degree of user-friendliness for its customers?

Value: Are you getting your money’s worth? Are there any hidden costs or charges? Does the company offer discounts?

Privacy: If health data is stored, will your data be stored securely? Are payments secure?

Customer support: Particularly in situations where ‘one size fits all’ doesn’t make sense, how well does the company help to make the service ideal for you?

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