Is It Normal To Have Different Size Testicles?

Just like other body parts, testicles size also varies with every individual, usually with no harmful effects. Testicles are oval-shaped sperm-producing organs with an average size of 4x3x2 cm.

Many men get scared seeing their testes of different sizes. This is something very common doubt among men, and many feel awkward about asking it even to their friends. But not discussing this is not the solution; this article is especially for such men. 

After reading this whole article, you will either get normal or feel the concern to consult with the doctor. But, for sure, this article will help you get over the overthinking of having different size testicles.

What Is The Normal Size Of A Man’s Testicles?

The normal size of the testicles is considered between 4.5 – 5.1 centimeters (1.8-2 inches). Testicles with sizes less than 3.5 centimeters or 1.4 inches are considered small in size. Additionally, it’s common to have one of the testicles of different sizes. In fact, testicles significantly change with time, let’s know-how?

Are Testicles Supposed To Change Size?

Yes, just like the growth of other body parts, testicles also tend to change with age. Normally, men have slightly different size testicles. However, it’s been observed, normal men have slightly different size testicles; the right testicle is often larger than the left. Also, one testicle, often the left one, hangs lower than the right.

Testicles’ function is to produce and store sperm under a specific range of temperature. Therefore, in order to maintain an optimum temperature for the sperm, these testicles change.

Why Does One Testicle Hang Lower Than The Other?

Many men face trouble thinking of having one testicle hanging lower than the other. Usually, this difference in testicle size is nothing to worry much but may cause a problem occasionally. Often, one testicle hangs lower than the other depending on the temperature; a warm climate may make it lose, and a cool temperature makes it shrink. 

Often left testicle hangs lower than the right one even if you are normal. There were many theories related to this, but none has been proved the exact reason. As per a French study, the left testicle has different modes of thermal regulation, making it hotter than the right one. As sperms are temperature sensitive, the high temperature of the left testicle than the right makes the left testicle hang lower than the other.

As per a Candian study, left testicles hang lower in right-handed men, and right testicles hang lower in left-handed men. Thus, just like handedness is related to cerebral asymmetry, some suggestions relate handedness with testicle size and its positions.

Is It OK To Have Different Size Testicles?

Yes, it’s normal to have different size testicles until and unless it’s not hurting you. However, it’s normal to have one testicle bigger than the other. Not every man has the same size testicles.

If It’s Normal Then Why Difference in Size?

Apart from normal conditions, some possible health complications cause different size testicles, here are some of them:-

Epididymitis is a condition when epididymis(a duct behind the testes) becomes inflamed due to infection or due to sexually transmitted diseases (STD) like chlamydia. This inflammation leads to the following symptoms, such as:-

  • Pain while urinating
  • Discharge from the penis
  • Inflammed testicles

Orchitis: It is a condition in which testicles are inflamed because of an infection. Men develop orchitis, often getting infected with mumps virus. This condition can lead to testicular pain and may damage the testicles.

Epididymal cyst: When a testicle gets enlarged due to the presence of excess fluid in the duct, this condition is called an epididymal cyst. It can even occur while the epididymis is developing. This can be a reason why the different sizes of testicles get resolved on their own in some cases.

The epididymal cyst doesn’t cause any harm or pain. It doesn’t require any treatment as they often go away on their own. Still, if the condition is causing discomfort, surgery can be helpful.

Hydrocele: Hydrocele is a condition when a sac is formed around the testicles and fills up with fluid. This condition requires treatment.

To know more about hydrocele, visit here.

Varicocele: The other possible condition why men have different size testicles is the veins. Enlarged veins can possibly lead to a change in the size of a testicle, this condition is medically termed varicocele. 

Usually, varicocele causes no additional symptoms but can lead to low sperm count.

Testicular torsion: Twisting of the spermatic cord when testicles rotate is another condition for the difference in the size of testicles. It can cause pain that severely starts lasts for a long time. This is an emergy condition and should be treated immediately. Testicular torsion can reduce the blood flow rate to the testicles, leaving it untreated may increase the risk and have to remove the testicle.

Testicular cancer: It is a rare type of cancer in which the cancer cells start to develop and multiply in the testicles. Lupus or new growths in the area are some of the possible symptoms of testicular cancer.

According to the American Cancer Society, it is a rare type of cancer developing in 1 out of 250 males. 

Also Read: Hydrocele Symptom: When Fluid Is Collected Around The Testicles!

What Are The Symptoms Of Worry?

It’s good to take care of your balls. If you have any doubt, you should consult your doctor; at least things will be clear. However, here are some symptoms that indicate problems with the testicle health, such as:-

  • Sharp pain in the testicles
  • Swelling of the testicles
  • Discharge of the penis
  • Difficulty while urinating
  • Back pain
  • Pain in the lower abdomen

However, even if you do not have the above symptoms and have doubts regarding testicle health, it is better to consult with the doctor.


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Janet Fudge

Janet Fudge writes on general health topics for She holds a post-graduate diploma in Public Health with a major in epidemiology. During the outbreak of COVID-19, Janet actively volunteered in vaccination drives throughout the state of Iowa. She lives in Iowa with her husband and two children.