Article on average penis size study results.
While results vary across studies, the consensus is that the mean human
penis is approximately 12.9–15 cm (5.1–5.9 in) in length with a 95% confidence
interval of (10.7 cm, 19.1 cm) (or, equivalently, 4.23 in, 7.53 in). The typical
girth or circumference is approximately 12.3 cm (4.85 in) when fully erect. The
mean penis size is slightly greater than the median size.Basically, the human
penis is made up of two parts: the shaft and the glans (also known as the head).
The shaft is not a muscle as some have suggested. It is made of three columns of
tissue, one of which continues forward to form the glans. These columns are
called the Corpus Spongiosus, which forms the underside of the penis and the
glans, and the Corpora Cavernosa, which are two chambers of tissue located next
to each other on the upper side of the penis.
Size at birth
The average stretched penile length at birth is about 4 cm (1.6 in), and 90% of
newborn boys will be between 2.4 and 5.5 cm (0.9 and 2.2 in). Limited growth of
the penis occurs between birth and 5 years of age, but very little occurs
between 5 years and the onset of puberty. The average size at the beginning of
puberty is 6 cm (2.4 in) with adult size reached about 5 years later. W.A.
Schonfeld published a penis growth curve in 1943.
Size with aging
Authors of a paper reviewing research on area of penis sizes conclude
that "flaccid penile length is just under 4 cm at birth and changes very little
until puberty, when there is marked growth."
Age is not believed to negatively correlate with penis size. “Individual
research studies have ... suggested that penis size is smaller in studies
focusing on older men, but Wylie and Eardley found no overall differences when
they collated the results of various studies [over a 60 year period].”
Erect length
Several scientific studies have been performed on the erect length of the adult
penis. Studies which have relied on self-measurement, including those from
Internet surveys, consistently reported a higher average length than those which
used medical or scientific methods to obtain measurements.
The following staff-measured studies are each composed of different subgroups of
the human population (i.e. specific age range and/or race; selection of those
with sexual medical concerns or self-selection) which could cause a sample bias.
* A study published in the September 1996 Journal of Urology concluded that
average erect length was 12.9 cm (5.08 in) (measured by staff). The purpose of
the study was to “provide guidelines of penile length and circumference to
assist in counseling patients considering penile augmentation.” Erection was
pharmacologically induced in 80 physically normal American men (varying
ethnicity, average age 54). It was concluded: “Neither patient age nor size of
the flaccid penis accurately predicted erectile length.”
* A study published in the December 2000 International Journal of Impotence
Research found that average erect penis length in 50 Jewish Caucasian males was
13.6 cm (5.35 in) (measured by staff). Quote: "The aim of this prospective study
was to identify clinical and engineering parameters of the flaccid penis for
prediction of penile size during erection." Erection was pharmacologically
induced in 50 Jewish Caucasian patients who had been evaluated for Erectile
dysfunction (average age 47±14y). Patients with penis abnormalities or whose ED
could be attributed to more than one psychological origin were omitted from the
study.
* A study conducted by LifeStyles Condoms found an average of 14.9 cm (5.9 in)
with a standard deviation of 2.1 cm (0.8 in) (measured by staff). The purpose of
this study was to ensure properly sized condoms were available. 401 college
students volunteered to be measured during 2001 Spring Break in Cancún, Mexico,
of which 300 gained an erection to be clinically measured (without
pharmacological aid). The 300 effective measurements makes this study double the
size of any prior study that uses medical staff to measure penis size (but the
sample is more representative of male American college students visiting Cancun,
and eager to have their penises measured, than it is of the entire male American
population.)
* A review published in 2007 issue of BJU Internetional, have shown that average
erect penis length is 14–16 cm and its girth is 12–13 cm. This paper compares
results of twelve studies conducted on different populations in several
countries.
Erect circumference
*The Cancún LifeStyle study, in which the circumference of the shaft was
measured at three points (base, mid-shaft, and just below the head) and then
averaged, found an average of 12.63 cm (4.972 inches) with a standard deviation
of 1.3 cm (0.5 in).
Similar results exist regarding studies of the circumference of the adult fully
erect penis, with the measurement taken mid-shaft. As with length, studies that
relied on self-measurement consistently reported a significantly higher average
than those with staff measuring.
Flaccid length
One study found the mean flaccid penis length to be 3.5 inches (8.9 cm)
(measured by staff). A review of several studies have shown average flaccid
length to be 9–10 cm. Length of the flaccid penis does not necessarily
correspond to length of the erect penis; some smaller flaccid penises can grow
much larger, and some larger flaccid penises cannot grow much larger.
The penis and scrotum can contract involuntarily in reaction to cold
temperatures or nervousness, referred to by the slang term "shrinkage", due to
action by the cremaster muscle. The same issue affects cyclist and exercise bike
users, with prolonged pressure on the perineum from the saddle, and the
straining of the exercise causing the penis and scrotum to contract
involuntarily which is sometimes referred to as "gym balls" or "saddle balls".
An incorrect saddle may ultimately cause erectile dysfunction (see crotch
pressure for more information).
Penises that are short when flaccid but more average when erect are colloquially
known as growers, where those with greater flaccid lengths that increase little
when erect are known as showers.
Flaccid penis length is a poor estimate of erect length, a better estimate is
stretched length, that is 12–13 cm, as shown in review by Wylie and Erdley.
Article on average penis size study results.
Every man wants to know if they are average or not,hopping they are not below
averages other wise what can they do? The problem is unfortunately there is no
definitive answer to this question. Many researches have been done and the
average penis size as ranged from 6 inches to 6.5 inches, the question is which
study to believe. Durex have been running a online study for many years now and
you can see their results by visiting their site..
The study which should be the most accurate is the report done by The Alfred C.
Kinsey Institute for sex. The largest sample of 10,000 men were measured and
then the results compiled. The results showed the average was 6-6.5 inches in
length. Average girth is 5-5.5 inches See graph below:
The size of your penis doesn't have a relationship with anything else. For
example a person with big feet does NOT necessarily have a 9 inch penis. Whether
you are above or below the average ask yourself does it really matter? If you
feel comfortable with the way your penis looks then it is not an issue. If not
then you could choose one of the many methods available today,to enlarge your
penis.Read our products reviews for more informations.
Were you one of those guys who wouldn't shower after gym class because of
embarrassment? You don't have to worry. Most girls get excited when they see a
man's penis and of course the bigger it is the more turned on she might get but
there are other alternatives to give a women an orgasm if you don't have a big
penis. So if your penis is small you can always try satisfying your partner in
other ways.
website:
www.sizegenetics.com 
