Will a Penile Implant Make My Penis Shorter? The Truth About Length and Girth
Many men worry that a penile implant will make their penis shorter or thinner. This is one of the most common questions asked before penile implant surgery.
The most accurate answer is:
A penile implant does not usually cause major shortening, but it is not designed to make the penis longer.
Most men can expect their erection after surgery to be close to the penis’s current stretched length. However, it may not be as long as the strongest erection they remember having many years ago.
Some men notice a small reduction in length. Others have no measurable change but still feel that the penis looks shorter. Understanding why this happens can help you have realistic expectations before surgery.
What does a penile implant do?
A penile implant is a device placed inside the penis to create a firm erection.
There are two main types:
Inflatable implants, which use a small pump placed inside the scrotum
Malleable implants, which are firm but bendable rods
The implant treats erectile dysfunction by providing firmness. It does not create new penile tissue and is not an enlargement procedure.
Current European and American guidelines recommend penile implants for men with erectile dysfunction who have not had satisfactory results from treatments such as tablets, injections or vacuum devices.[1,2]
Will my penis be shorter after surgery?
For most men, the penis after implant surgery is close to its current stretched length before surgery.
However, studies have produced slightly different results.
Some studies have found no significant loss of length after implant surgery.[3,4] Other studies have found a small average reduction, usually less than 1 cm, when the implant erection was compared with a very firm erection produced by an injection before surgery.[5]
This means that a small reduction is possible, but major shortening is not expected in most patients.
Why do some men feel that their penis is shorter?
Feeling shorter is more common than actually measuring shorter.
In one study, researchers found no significant change in measured penile length after implant surgery. However, almost three-quarters of the men still felt that their penis had become shorter.[3]
There are several possible reasons for this.
Men may remember their erections from years ago
Many men compare their implant erection with the best erection they had when they were younger or before developing erectile dysfunction.
However, the penis may already have become shorter before the implant operation because of ageing, poor erections, scarring or previous treatments.
A more realistic comparison is the penis’s current stretched length before surgery, not the longest erection you remember from the past.
Erectile dysfunction may already have caused changes
Men often live with poor-quality erections for months or years before having implant surgery.
When the penis does not regularly become fully erect, the tissues may lose some flexibility. This can reduce how much the penis expands.
Shortening may also happen after:
Prostate cancer surgery
Pelvic radiotherapy
Peyronie’s disease
A prolonged painful erection, known as priapism
A previous penile implant infection
Previous penile or pelvic surgery
Severe scarring inside the penis
In these situations, the loss of length may have happened before the implant was inserted.
The head of the penis may be softer
The implant supports the shaft of the penis but does not extend into the head of the penis, known as the glans.
Some men still experience natural swelling of the glans during sexual arousal. Others notice that it remains softer, particularly after prostate surgery or when there is poor blood flow.
A softer glans can make the penis look slightly shorter or less full, even when the shaft length has been maintained.
Part of the penis may be hidden
Weight gain or a larger fat pad above the penis can hide part of the shaft.
This can make the visible penis look shorter even though the internal length has not changed. Weight loss may improve the amount of penis that is visible in some men.
How do we estimate the likely length before surgery?
Before surgery, the penis can be gently stretched and measured.
This stretched measurement is usually the best guide to the likely length of the penis when the implant is fully inflated.[6]
The measurement is more helpful than trying to estimate length from memory or from erections that occurred many years earlier.
However, no surgeon can guarantee an exact final length. The result depends on:
Your natural anatomy
The amount of scarring inside the penis
Previous prostate or pelvic surgery
Peyronie’s disease
Previous implant surgery
The type of implant used
Healing after surgery
Can the surgeon use a larger implant to make the penis longer?
During surgery, the surgeon measures the space inside the penis and chooses an implant that fits correctly.
Using an implant that is too large is not safe.
An oversized implant can place too much pressure on the tissues and may cause:
Ongoing pain
Bending or an unnatural shape
Damage to the skin or tissues
The implant wearing through the tissue
A need for further surgery
The aim is to choose the correct size for a firm, comfortable and reliable erection—not to force extra length.
What happens to penile girth?
Most men find that an inflatable implant provides good firmness and fullness.
Studies suggest that penile girth is usually maintained and may increase slightly in some men after surgery.[4,7]
However, a penile implant is not a girth-enhancement operation. The final width of the penis depends on:
Your natural anatomy
The amount of scarring
The type of implant
The size of the implant cylinders
How fully the device is inflated
How the tissues heal
Some inflatable implants expand more in width than others, but implant choice should be based on your anatomy, medical history and surgical needs.
Will regular inflation improve the result?
Once the wound has healed, patients with an inflatable implant are taught how to inflate and deflate the device. This is called cycling the implant.
Regular cycling may help the penis become comfortable around the fully inflated cylinders. It also helps the patient become familiar with using the pump.
One study found that most men felt their length was the same or better after following a regular inflation programme for one year.[8]
However, cycling does not guarantee an increase in length. It should only begin when your surgeon confirms that healing is complete enough.
Starting too early or inflating through significant pain may interfere with healing.
Can traction or a vacuum pump help?
Penile traction devices and vacuum erection devices have been studied before and after implant surgery.
They may be helpful for selected men, particularly those with severe shortening or scarring. However, they are not necessary for every patient, and the evidence is still limited.
Do not use traction or vacuum treatment around the time of implant surgery unless your surgeon has recommended it.
What about surgery to restore lost length?
More complicated operations can be used in selected men with severe shortening, Peyronie’s disease or major scarring.
These procedures attempt to release or expand scarred tissue. However, they carry greater risks than standard implant surgery, including:
Bleeding
Infection
Reduced sensation
Damage to the penis
Problems with the implant
The need for further surgery
These procedures are not appropriate for most patients and should only be considered after careful assessment by an experienced penile implant and reconstructive surgeon.
Will the implant affect sensation or orgasm?
A penile implant is designed to improve firmness. It does not directly increase sexual desire or sensation.
Most men can still experience sexual pleasure and orgasm after surgery if they were able to do so beforehand. The implant also does not directly affect ejaculation.
However, prostate surgery, diabetes, nerve damage, medications and other health conditions may already have affected sensation, ejaculation or orgasm before the implant is inserted.[2,9]
What should I realistically expect?
The most realistic expectation is:
The implant should provide a dependable erection that is close to your current stretched penile length.
It may not recreate the penis you had when you were younger or before prostate surgery, Peyronie’s disease or long-term erectile dysfunction.
A penile implant should be viewed as a treatment for reliable firmness—not as a procedure to increase penile size.
Take home message
A penile implant does not usually cause major penile shortening.
Most men can expect:
A firm and reliable erection
Length close to their current stretched penile length
Girth that is maintained or sometimes slightly increased
A softer head of the penis in some cases
A result that may look different from erections they remember from years earlier
Some men notice a small reduction in length, while others feel shorter even when measurements have not changed.
Careful measurement, correct implant sizing, realistic expectations and appropriate cycling after surgery can help achieve the best possible result.
The main benefit of a penile implant is not making the penis larger. It is restoring a reliable erection that can be produced when desired and maintained during sexual activity.
This article provides general information and does not replace an individual medical consultation. Results vary depending on anatomy, medical conditions, previous treatments, scarring and the type of implant used.
References
European Association of Urology. EAU guidelines on sexual and reproductive health. Arnhem: EAU Guidelines Office; 2026.
Burnett AL, Nehra A, Breau RH, Culkin DJ, Faraday MM, Hakim LS, et al. Erectile dysfunction: AUA guideline. J Urol. 2018;200(3):633-641.
Deveci S, Martin D, Parker M, Mulhall JP. Penile length alterations following penile prosthesis surgery. Eur Urol. 2007;51(4):1128-1131.
Habous M, Giona S, Tealab A, Aziz M, Sherif H, Abdelwahab O, et al. Penile length is preserved after implant surgery. BJU Int. 2019;123(5):885-890.
Wang R, Howard GE, Hoang A, Yuan JH, Lin HC, Dai YT. Prospective and long-term evaluation of erect penile length obtained with inflatable penile prosthesis compared with that induced by intracavernosal injection. Asian J Androl. 2009;11(4):411-415.
Osterberg EC, Maganty A, Ramasamy R, Eid JF. Pharmacologically induced erect penile length and stretched penile length are both good predictors of post-inflatable prosthesis penile length. Int J Impot Res. 2014;26(4):128-131.
Xie D, Nicholson M, Gheiler V, Perito D, Siano L, Kislinger I, et al. A prospective evaluation of penile measures and glans penis sensory changes after penile prosthetic surgery. Transl Androl Urol. 2017;6(3):529-533.
Henry GD, Carrion R, Jennermann C, Wang R. Prospective evaluation of postoperative penile rehabilitation: penile length/girth maintenance 1 year following Coloplast Titan inflatable penile prosthesis. J Sex Med. 2015;12(5):1298-1304.
Levine LA, Becher EF, Bella AJ, Brant WO, Kohler TS, Martinez-Salamanca JI, et al. Penile prosthesis surgery: current recommendations from the International Consultation on Sexual Medicine. J Sex Med. 2016;13(4):489-518.
