There are different reasons why one testicle may appear bigger than the other. If one of your testicles is slightly bigger than the other, don’t panic, this is completely normal for most men and boys.
The average testicle size is around 4 x 3 x 2 centimeters (cm). However, testicle size can vary. A person may also have one testicle smaller than the other. The testicles are oval-shaped male ...