There are several method to measure penile length.
It is important to use correct method.
Non bone pressed method (Most popular method)
Measure upper side of the penis from the pubopenile skin junction to the tip of the glans.
Do not push the ruler in to the fad pad.
Bone pressed method (Medical method)
Measure upper side of the penis from the pubis to the tip of the glans.
Push the ruler to the pubis tightly.
The length include the fad pad depth.
Stretched penile length (Medical method)
Hold the glans and pull the flaccid penis maximally.
Measure upper side of the penis from the pubis to the tip of the glans.
Push the ruler to the pubis tightly.
The length include the fad pad depth.
Stretched penile length and erect penile length is almost same.
Penis girth
Circumference of the penis
Wrap the measuring tape around the shaft of the penis.