Is It Normal for One Testicle to Be Bigger?

Is It Normal for One Testicle to Be Bigger?

I'm 15, almost 16, and I've noticed that one of my testicles is bigger than the other one. Is there something wrong?
- Brandon*

It's normal for teen (and adult) guys to have a slight difference in the size of their testicles. So there's probably nothing wrong. A normal size difference is about the equivalent of half a teaspoon — and usually the right testicle is larger than the left.

Talk to your doctor if it seems like there's a big difference in size or if you have pain or a lump in one of your testicles.

Reviewed by: T. Ernesto Figueroa, MD
Date reviewed: June 2012

*Names have been changed to protect user privacy.

Note: All information is for educational purposes only. For specific medical advice, diagnoses, and treatment, consult your doctor.

© 1995-2015 KidsHealth® All rights reserved.
Images provided by iStock, Getty Images, Corbis, Veer, Science Photo Library, Science Source Images, Shutterstock, and

Bookmark and Share

Related Resources
Web SitePlanned Parenthood Info for Teens This site from the Planned Parenthood Federation of America has information on relationships and sexual health for teens.
Related Articles
Testicular Injuries Serious testicular injuries are relatively uncommon, but testicular injury can be painful. Read this to find out what steps you can take to protect yourself from injury.
Male Reproductive System What makes up a guy's reproductive system and how does it develop? Can anything go wrong? Find the answers to these questions and more in this article.
I Have Bumps On My Penis. Is This Normal? Find out what the experts have to say.
Why Does the Doctor Have to Examine My Testicles? Find out what the experts have to say.
Varicocele A varicocele is an enlargement of the veins in the scrotum. Although there is no way to prevent a varicocele, it usually needs no special treatment.
Is My Penis Normal? Just about every guy wonders about the size of his penis at one time or another.
Testicular Exams If you're a guy, you may be wondering why the doctor needs to do a testicular exam. Find out in this article.
How to Perform a Testicular Self-Examination The testicular self-examination (TSE) is an easy way for guys to check their own testicles to make sure there aren't any unusual lumps or bumps - which are usually the first sign of testicular cancer.
Developments Developments
Sign up for enewsletter
Get involved Get involved
Discover ways to support Akron Children's