Basically, the length is always measured on the top of the stem root to the top of the glans.
If a fat pad is located above the root of the penis, it may be pressed in slightly during measurement.
For measurements of the circumference, one usually takes the circumference at the root.
In some studies, the circumference of the glans was measured instead, so this information would be very contradictory and therefore not included in the analysis.
In this evaluation, the results of numerous studies have been evaluated and made relative to the number of their probands.
Wherever possible, sources where skipped when they were based on self-reported measurements. The collected values should roughly illustrate the relationship between penile sizes and origin, instead of giving an exact evaluation. In some cases there were only a few dozens of test persons in a country, which doesn't allow a representative survey.
To measure your penis, first gather a ruler or tape measure. Place the end of the ruler or tape measure against the top of the penis, which is the area where the penis connects to the pubic bone. Compress any fat around the top of the penis so the ruler or tape measure is as close to the pubic bone as possible.
Measure from the base of the penis to the tip of your glans. The glans is the rounded part of the penis’s tip or end. Do not include any additional length from the foreskin.
To measure the circumference, wrap the tape measure around the base or the middle of the shaft.
A lot of men might take solace in this fact: our penises are longer than they look. In fact, around half of its entire length is housed inside of our bodies.
You might be thinking, "Well, it's no good to me up there," but it needs to remain connected to the rest of your anatomy, so it's probably best that it stays put.
As you can see from the diagram here, the mass of pink erectile tissue — which comprises the so grandly named corpus cavernosum and corpus spongiosum — extends well into the pelvic region, forming a sort of boomerang shape.
I wouldn't use any of the above as a pick-up line, though.
Let's lay this one to rest, shall we? According to a study published in the journal BJU International, there is no correlation between shoe size and penis length.
Although an older study — which was published in 1993 — did find that penile length was related to both height and foot length, it was a weak relationship, and the authors concluded, "Height and foot size would not serve as practical estimators of penis length."
Also, the International Journal of Impotence ResearchTrusted Source published an Iranian study looking at other correlations. They concluded that "penile dimensions are significantly correlated with age, height, and index finger length," but not foot size.
A study on 274 men demonstrated that there is no correlation between the length of a flaccid penis and its erect size. Some start small and end up large (a grower), while some are large when flaccid and only grow a little when erect (a show-er).
Some are even small whatever state they are in, and some are large when flaccid and get much larger. It's a mixed bag.
This doesn't hold much relevance outside of the locker room, but I guess it's good to know anyway.
I've written a more in-depth answer in regards to whether or not penis size matters. If you'd like to read it, click here.