Thanks for your question! Studies have show that the average adult penis size is between 5 and 6 inches when fully erect, as measured from the lowest portion of the stomach; just above the base of the penis, to the tip of the penis. It’s important to understand that the size of a guy’s penis is determined by genetic traits that he inherits from his parents̶̶̶ just like your height, eye color, and skin tone. Most guys are fully developed between the ages of 18-21 so the size of your penis is completely normal.

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