According to the search results, the normal prostate volume in cc is approximately 20 cc. However, it is important to note that prostate volume can change over time and can vary depending on age and ethnicity. For example, in men aged 50-80 years, mean total prostate volume continuously increased from 24 to 38 cc. Additionally, prostate volume was statistically different among ethnic groups, with median size of prostate gland significantly larger in Lega: 55 cc, and smaller in Havu, 20 cc.