Penis Enlargement – Girth

The penile girth involves the circumference or thickness of the penile shaft and glans (head of the penis – see separate procedure titled, ‘Penile Glans -or head of Penis- Enlargement for more details). The penis has two states, the flaccid (or soft), and the erect (or firm). The penile shaft and glans girth typically increase dramatically from the flaccid to erect states. The normal range of the flaccid girth or circumference is 3.5 to 4.5 inches. The normal range for the erect girth or circumference is 4.5 to 5 inches, plus or minus a quarter inch.

Dr. Victor Liu

Senior Medical Director at The Center for Sexual Enhancement – San Francisco, CA

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Penile Girth Enlargement

Before discussing the minimally invasive medical permanent filler technique one must recognize that there are numerous traditional invasive surgical methods available. These are discussed in more detail in the topic Introduction to Male Enhancement.

Non-surgical penis enhancements have long existed, and as technology has developed, they have gotten a lot more nuanced — not to mention the intriguing advertisements that pull you in.

Over-the-Counter Penis Enlargement Devices

Vacuum Pumps

Medical grade Vacuum pumps are FDA approved for temporary treatment of erectile dysfunction and provide a temporary erection for men with underlying medical problems. Many “over-the-counter” pumps are available that perform the same function. While prolonged pumping in healthy men can provide a small, temporary increase in penis size over normal, the results will only last for a few hours at most. There is little evidence to suggest the pumping will result in permanent increases in penis size.


Prescription medications such as Viagra or Cialis can assist with providing a normal erection in men with erectile dysfunction however they will not provide an increase in size. Over-the-Counter pills will NOT cause the penis to increase in size. Most of the effects of these medications are unproven and in some cases can cause problems with blood pressure and other medical illnesses and should be used with caution.

Manual Stretching Exercises

Commonly known as Jelqing, have been around for many years. While there are some empirical data to suggest the technique works, scientific studies have yet to prove the same.


Extenders can include mechanical stretching devices and “hangers”, devices applied to the penis that are then attached to a weight and worn from minutes to hours (with breaks). Mechanical extenders have some scientific studies to support growth in penis length up to ½” however this involved wearing the extender for 6 hours a day for several months and extenders cannot be worn and camouflaged under clothing.

Non-Surgical Penis Enlargement by Plastic Surgeon, Dr. Liu

At The Center for Sexual Enhancement, we use a minimally invasive permanent filler medical technique. The procedure is a technique that is used for penile shaft girth enlargement, penile shaft flaccid lengthening, penile glans (head of the penis) enlargement & scrotal/testicular enhancement, and for corrective treatment.

This procedure is without the use of general anesthesia, without the need for sutures, without the high risk for scaring and infection and is generally tolerated very well with minimal discomfort in most cases. The technique involves inserting tissue layering activation filler material into the penis, just beneath the penile skin.

After the material has been inserted, your body will be stimulated to produce your own natural collagen. Collagen is the “scaffolding” the holds together your skin, subcutaneous tissue, tendons, ligaments and muscles.

This newly formed permanent collagen then allows growth of new blood vessels, nerves and other tissues into the area and is what causes the Penile Shaft Girth to increase. This process is natural and permanent.

Points to Keep in Mind With Penis Enlargement

Keep in mind that the Penile Enlargement process is more of an personal preference and we strive to achieve the results that are best for you and your partner. While some patients will be satisfied with one treatment, more achieve optimum results with at least 2 treatments. After the first treatment, two issues may come up, one being the obvious…wanting the next size increase in girth, and two, having to balance areas to achieve a functional and aesthetic balance.

Considering that Dr. Liu relies upon his patients to follow certain protocols and massaging instructions, results may vary. The vast majority of patients who follow the post procedure protocols achieve very good results. Those who do not risk less-than optimal results.

A special note must be made about the natural collagen that is formed from the stimulation of the filler material. First and foremost, it is your own natural living permanent collagen matrix tissues, and like all natural living tissue, it will respond to stress.

The penis, now enlarged by this production of collagen, will be subject to the stress of sexual intercourse, masturbation, etc. Over a long period of time, and if sexual activity is above average, there might be subtle shifts in the collagen material necessitating possible future symmetry enhancement treatments.

If the collagen is very thick, after having two or more treatments, the risk is far lower due to the increased amount of collagen volume, resulting in a much more stable collagen structure that is able to resist major forces and pressures.

Dr. Liu’s favorite material for non-surgical augmentation is the patient’s own fat. There are several advantages for using the patient’s own fat. Because it is from the patient’s own body, there is no chance of rejection by the body, and there is an almost unlimited supply so re-injection can be done whenever the patient desires. Additionally, if for any reason, the injected fat is uneven, the excessive area can be trimmed and new fat injected into the depressed areas.

The only disadvantage of using fat is that normally, 40% to 50% of the fat injected will disappear. Also, if a significant quantity of fat is injected by itself, it can feel too soft and unnatural. However, if done with sheaths such as Surgimend or Alloderm, it feels natural and can be used with good results.

The surgical way of augmenting the shaft of the penis involves insertion of Alloderm or Surgimend. These are sheaths made of collagen and are used to wrap around the shaft of the penis, thereby immediately increasing the girth. Additionally, it stimulates collagen formation by the body itself, resulting in a further increase of the girth of the penis over time. The insertion of the sheaths can be done via the same incision used for detachment of the suspensory ligament of the penis. Therefore, although this is a surgical procedure, no new incision is required. The sheath comes in 1mm to 4mm in thickness. Most commonly, 3mm sheaths are used, but when indicated, 4mm can be used as well. Therefore, by inserting a 4mm sheath, the circumference of the shaft of the penis increases by 1 inch automatically because of the size of the sheath. With the stimulation of collagen formation, it will grow as much as another ½ inch. Therefore, the total increase in girth is between 1 to 1½ inches. To illustrate the significance of this, please look at the diagram.

During the one-on-one consultation with Dr. Liu, he will examine you and will suggest the best options for you. Of course, Dr. Liu will consider your input and preferences, and together, you will come to an agreement as to what the treatment will be – injection or surgery, and what type of surgery or what type of injection will be used.It is, therefore, essential that you see Dr. Liu for consultation and because of this, Dr. Liu extends to you an invitation for a free consultation.

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