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  2. Human penis size - Wikipedia

    en.wikipedia.org/wiki/Human_penis_size

    A US study published in 2015 of the stated preferences of a panel of 75 women using 3D-printed models as scale references showed a preferred penis length of 16 cm (6.3 in) and a preferred circumference of 12.2 cm (4.8 in) for long-term sexual partners, with slightly larger preferred sizes of a length of 16.3 cm (6.4 in) and circumference of 12. ...

  3. Bust/waist/hip measurements - Wikipedia

    en.wikipedia.org/wiki/Bust/waist/hip_measurements

    These women have ribcage circumferences differing by 2 inches, but when breast tissue is included the measurements are the same at 38 inches. The result is that the latter woman will appear "bustier" than the former due to the apparent difference in bust to hip ratios (narrower shoulders, more prominent breasts) even though they are both ...

  4. Wheel sizing - Wikipedia

    en.wikipedia.org/wiki/Wheel_sizing

    The final number in the code (e.g.,"14") is the mating wheel diameter measured in inches. The overall circumference of the tire will increase by increasing any of the tire's specifications. For example, increasing the width of the tire will also increase its circumference, because the sidewall height is a proportional dimension.

  5. Circumference - Wikipedia

    en.wikipedia.org/wiki/Circumference

    The circumference of a circle is the distance around it, but if, as in many elementary treatments, distance is defined in terms of straight lines, this cannot be used as a definition. Under these circumstances, the circumference of a circle may be defined as the limit of the perimeters of inscribed regular polygons as the number of sides ...

  6. List of formulas in elementary geometry - Wikipedia

    en.wikipedia.org/wiki/List_of_formulas_in...

    The basic quantities describing a sphere (meaning a 2-sphere, a 2-dimensional surface inside 3-dimensional space) will be denoted by the following variables r {\displaystyle r} is the radius, C = 2 π r {\displaystyle C=2\pi r} is the circumference (the length of any one of its great circles ),

  7. Bra size - Wikipedia

    en.wikipedia.org/wiki/Bra_size

    The difference in chest circumference between the cup sizes is always one inch, or 2.54 cm. The difference between 2 band sizes is 2 inches or 5.08 cm. Leading brands and manufacturers including Panache, Bestform, Gossard, Freya, Curvy Kate , Bravissimo and Fantasie, which use the British standard band sizes (where underbust measurement equals ...

  8. Waist-to-height ratio - Wikipedia

    en.wikipedia.org/wiki/Waist-to-height_ratio

    A 2013 study identified critical threshold values according to age, with consequent significant reduction in life expectancy if exceeded. These are: WHtR greater than 0.5 for people under 40 years of age, 0.5 to 0.6 for people aged 40–50, and greater than 0.6 for people over 50 years of age. [15]

  9. Human vaginal size - Wikipedia

    en.wikipedia.org/wiki/Human_vaginal_size

    lengths (measured using rods): 6.9 to 14.8 cm (2.7 to 5.8 in); widths: 4.8 to 6.3 cm (1.9 to 2.5 in); introital diameters: 2.4 to 6.5 cm (0.94 to 2.56 in) A second study by the same group showed significant variations in size and shape between the vaginas of women of different ethnic groups. [4]