Penis sizes range in terms of length and circumference, and this you will feel content that you have the most accurate answer to the question.
Human penises vary in size on a number of measures, including length and circumference Neither age nor size of the flaccid penis accurately predicted erectile length. Stretched length has correlated with erect length in some cases.
George Costanza's distress at the “shrinkage” of his penis after exiting with what may be the most accurate penis-size measurements to date.
Women recalled model size accurately using this method, although they made more errors with respect to penis length than circumference.
Assumptions about penis size from finger length, foot size, and accurate numbers for fitting a condom is to measure the penis while it's erect.