The testicular volume of a normal adult male is about 12-15mL, with a specific measurement of about 4-5cm in length, 3-4cm in width, and 2-3cm in thickness. However, the volume and size are not absolutely the same at different ages, but can be considered normal as long as they are within the standard values. There may be a certain relationship with race, height, weather, and external environment. For example, the volume may shrink slightly to the touch in cold weather and increase slightly in hot weather. If the examination reveals that the value or volume significantly exceeds the above, then abnormalities are considered, such as the presence of testicular inflammation or testicular tumor, testicular atrophy, etc. If the testicles are found to be significantly abnormal then a hospital examination is required. Men have 2 testicles, which are symmetrical and basically equal in size. If you find that both testicles are abnormally large or unequal in size in your daily life, you may have a disease and need to go to the hospital for examination to confirm the diagnosis.