Average penis size. For many at age 16, that’s an average flaccid (not erect) length of about 3.75 inches and an average erect length between 5 and 7 inches. The girth (circumference) of a flaccid penis and an erect penis average about 3.6 inches and 4.5 inchesTrusted Source.
A physical exam may be more telling between the ages of 15 and 16 when the penis is most likely to experience growth. But even then, there may be factors.
National average is 5 inches for an adult male (21 years +). Boys don't stop growing till 21. Orgasm for a female is achieved by the rhythmic thrusting of your .
George Costanza's distress at the “shrinkage” of his penis after exiting A 16-cm (6.3-inch) erect penis falls into the 95th percentile: Out of 100.