Others stay pretty much the same size.Ībout half of all penises in the US are circumcised, and half are uncircumcised (still have foreskin) - so both types are common. Some penises get much bigger when they get hard. The size of your penis when it’s flaccid (soft) doesn’t have much to do with its size when it’s hard.

The average size of an adult erect (hard) penis is 5 to 7 inches long. This makes your penis get harder and stand up, which is also called getting an erection or hard-on. When you get turned on, blood fills these tissues. Your penis is made of 3 layers of spongy tissue. Your penis and scrotum are the two parts of the male (or what’s typically called male) external sex anatomy (outside your body).

Sexual anatomy that’s typically called male includes your penis and scrotum (external male genitalia) and internal reproductive organs like the testicles.