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Distribution of penis sizes by length. 45% of erect penises are between 12 and 14 cm long. [2] Distribution of penis sizes by circumference. 81% of erect penises (green) are between 10 and 13 cm in circumference. [2]
The 2D:4D ratio is calculated by dividing the length of the index finger by the length of the ring finger of the same hand. Other digit ratios are also calculated similarly in the same hand. The digit length is typically measured on the palmar (ventral, "palm-side") hand, from the midpoint of the bottom crease to the tip of the finger. [8]
Due to natural variation, individuals pass through the Tanner stages at different rates, depending in particular on the timing of puberty.Among researchers who study puberty, the Tanner scale is commonly considered the "gold standard" for assessing pubertal status when it is conducted by a trained medical examiner. [5]
This study of "2126 boys (156 male newborns, 1198 male infants under 2 years old, and 772 boys older than 2 years old)" does conclude "Normal stretched penile length varied between different ethic groups, and maybe body size contribute more or less to smaller penile size in Taiwanese boys compared to Caucasian boys in light of general knowledge ...
legs (floor to crotch, which are typically three-and-a-half to four heads long; arms about three heads long; hands are as long as the face. [ 10 ] Leg-to-body ratio is seen as indicator of physical attractiveness but there appears to be no accepted definition of leg-length: the 'perineum to floor' measure [ e ] is the most used but arguably the ...
Lichas - thumb length. This is a list of units of measurement based on human body parts or the attributes and abilities of humans (anthropometric units). It does not include derived units further unless they are also themselves human-based. These units are thus considered to be human scale and anthropocentric.
A large-scale study assessing penis size in thousands of 17- to 19-year-old males found no difference in average penis size between 17-year-olds and 19-year-olds. From this, it can be concluded that penile growth is typically complete not later than age 17, and possibly earlier.
In the section "Penis size and female genital response", it's written that 4 in equal 8.5 cm. This is simply false, as 1 in = 2.54 cm, and 4 * 2.54 = 10.16 cm. Interestingly, the article from which the information is gotten, has also made the same mistake, but that does not change math and measurement conventions.