Sizedoctor system
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Sizedoctor system pro extender
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SizeDoctor® Pro Full Extender System - World's Most Powerful [4,800g Max Traction]

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If you could only ever buy 1 Penis Enlargement product, pick this

If your product doesn't work, send it back to us for a full refund, no questions asked. We pride ourselves in delivering quality products and customer satisfaction. For more queries, email us at

 How does it work? 

View Our Sizedoctor How-To Youtube Playlist Here

  • By applying a constant traction force, the device will lead to permanent stretching of the penis tissues: in particular the collagen fibres, which often have a lot of slack which can be stretched out (for newbies). This is for both the ligaments and penis chambers themselves. Collagen also will remodel over time in response to the stretch, further increasing size.
  • Painless and permanent without side effects
  • The results will be directly proportionate to the usage time and intensity of the pull. 
  • Clinical studies have shown that if the device is used for an average time of 8-10 hours a day, there will be a significant increase in penis length and girth within just 6 months (Up to 2" length and 0.75" girth respectively)
  • You can use your device while you are at home or even at night while you sleep and see results in a really short time. Note it is not 100% unnoticeable - so I recommend it for when at home alone (e.g. studying) 
  • The vacuum cap also can help the GLANS itself grow through constant negative pressure, ensuring the penis remains aesthetic and *easier to stretch in the future*

Why SizeDoctor® Pro is a STEP ABOVE THE PACK



SizeDoctor adds extreme comfort for extended stretching sessions unlike any other penis extender on the market. With a whole new glans vacuum attachment system to secure the penis this eliminates rash, scathing, bruising, fatigue and slippage all while being medically safe. Unlike a cheap noose system, you won't have to constantly readjust it or worry about stopping blood flow - which is the reason so many people simply give up when using other devices.

Strongest Extender On the Market - Up to 4.8kg (10.5lbs) Traction Force

The SizeDoctor Pro is the only extender on the market that offers such a wide range of tension adjustments from very gentle all the way up to 4.8kg (10.5lbs)! Other top penis extenders on the market max out at just 2.8kg. Only hanging, which is far harder and requires full privacy, can ever equal the Sizedoctor's force.

The more force the extender exerts over time, the faster your gains will be

Largest Base on the Market and Better Design

With a massive 2" (51mm) wide base, the SizeDoctor can accommodate virtually all girths. Other extenders top out at 1.6" wide which can be too tight for larger girth penises. Instead of a loop, the SizeDoctor uses a C shape, further improving fit and preventing the pain that comes from the base pressing on the balls - which is very useful! This also allows you to stretch more of the inner penis all the way to the pubic bone, to further speed up your gains.

Fits penises of all sizes - up to 11"

SizeDoctor Pro comes out the box with twelve extension rods allowing the device to extend up to 11" (280mm) in length. The system includes 4x 5mm, 4x 20mm & 4x 40mm extension rods. This is long enough even for your wildest aspirations, yet can be adjusted to fit small penises too! If you ever get too long for this, contact us- you can become a hall of famer!


  • Maximum Tested Tension 4800g (10.5lbs)
  • Luxury Box
  • 1 x Extender Body
  • 1 x Valve
  • 6 x Girth Fixing Band
  • 4 x  4CM/1.6" Extender Bar
  • 4 x 2CM/0.8" Extender Bar
  • 4 x 0.5CM/0.2" Extender Bar
  • 1 x Instruction Manual
  • 1 x Pump Ball



 Sizedoctor penis enlargement extender diagram explained gethung

1. Penis extender base: Supports extension bars.

2. Joint nut: Connects base and extension bars. Turns 180 degrees for comfort and mobility.

3. Joint bolts: Connects base and extension bars. Unscrew joint volt first to connect extension bars.

4. Extension bars: There are 3 types to adjust the length of rods.

5. Drawbar: Adjust tension of springs.

6. Fixing bolt: Connect Drawbar and spring tube.

7. Springs Fixing Bolts: Fix springs and provide constant tension.

8. Springs:  Provide tension (traction) to penis, from 0 to 4.8kg

9. Safety valve: To maintain constant pressure in vacuum tube and release pressure when needed.

10. Vacuum tube: Expands head girth with negative pressure and keeps the head in place without the need for dangerous nooses. If edema becomes a problem, try tape wrap, available on our store.

11. Girth fixing band: Maintain pressure in vacuum tube and fixes head in place.

12. Spring power index: Shows 13 levels of spring power so you can clearly see and adjust


Instruction Videos Playlist Below

We are selling at a limited time massive discount. Get yours today!


Customer Reviews

Based on 15 reviews
Not for me
Hi, we heard this from a few people who started with this device and I had some issues getting used to it myself at the beginning. I have put a playlist with some video guides on our Youtube Channel - check them out:
Super Extender
Love It
Learning Curve