Sizegenetics Up to $200 OFF!

What Exactly Is SizeGenetics?

The SizeGenetics™ device is a medically certified penis extender, also commonly referred to as a penile stretcher or a penile traction device (PTD). Traction devices have been utilized for decades and operate by applying steady, gentle tension along the shaft of the penis.

This consistent mechanical tension works over an extended period on the principle of cytokinesis (cell stimulation), encouraging natural tissue adaptation and gradual expansion.

Why Use SizeGenetics?


How SizeGenetics Traction Device Works

  • Designed to Gradually Support Penile Length and Girth
  • Recommended by Urologists and Post-Surgery Specialists
  • Helps Correct and Straighten Penile Curvatures

Does SizeGenetics Really Work?

The SizeGenetics™ device is grounded in the medical principle of tissue traction—a method widely used in various orthopedic and reconstructive procedures (such as limb-lengthening treatments).

In clinical practice, early versions of penile traction devices were adopted by urologists and surgeons to assist patients during recovery after penile surgery (to prevent scar tissue contraction) and as a non-invasive approach to managing penile curvature.

Key Benefits of Using SizeGenetics

  • Supports gradual, natural penile lengthening (individual results vary)
  • Helps reduce penile curvature comfortably at home
  • Utilized by sexual health specialists and surgeons
  • Registered as a Class 1 Medical Device
  • Clinically evaluated and suitable for adult men of all ages
  • Backed by published clinical traction studies
  • Aims to boost bedroom confidence and self-esteem
  • Over 20 years of established presence on the market
  • Discreet and fast shipping from US and UK distribution centers
  • Featured in mainstream media, including GQ Magazine & Channel 4 (UK)

Engineered for Comfort

One of the biggest challenges with standard traction devices is comfort. The SizeGenetics™ device addresses this with a 16-Way Comfort Strap System, allowing you to wear the extender in 16 different configurations tailored to your anatomy.


SizeGenetics 16-Way Comfort Strap System

While basic extenders offer only a single attachment method—often leading to discomfort and inconsistent use—SizeGenetics utilizes an MDA (Multi-Directional Angling) design to maximize ergonomics during daily wear.

SizeGenetics in Pictures


SizeGenetics Kit Components


SizeGenetics High Grade Medical Materials

Registered and Medically Backed

SizeGenetics™ is a certified Class 1 Medical Device (CE Marked), manufactured to strict health and safety standards and endorsed by professionals in the field of men’s sexual health.

180-Day Money-Back Guarantee

SizeGenetics™ comes with a 180-day money-back guarantee. This gives new users a full 6 months to consistently test the device according to the recommended program, offering peace of mind compared to competitors with short, restrictive return windows (terms and conditions apply on the manufacturer’s website).