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  2. Paper size - Wikipedia

    en.wikipedia.org/wiki/Paper_size

    It is a transitional size with the shorter side of ISO A4 (210 mm, 8 + 1 ⁄ 4 inch) and the longer side of British Foolscap (13-inch, 330 mm). ISO A4 is exactly 90% the height of F4. ISO A4 is exactly 90% the height of F4.

  3. Orders of magnitude (length) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(length)

    2 cm – approximate width of an adult human finger; 2.54 cm – 1 inch; 3.08568 cm – 1 attoparsec; 3.4 cm – length of a quail egg [113] 3.5 cm – width of film commonly used in motion pictures and still photography; 3.78 cm – amount of distance the Moon moves away from Earth each year [114] 4.3 cm – minimum diameter of a golf ball [115]

  4. List of scale model sizes - Wikipedia

    en.wikipedia.org/wiki/List_of_scale_model_sizes

    The dominant European size for die-cast ship models, most comprehensive range. 1:1200: 0.01 0.254 mm: Ship models: A British and American size for ship and harbour models. Airfix used to produce in this scale. 1:1000: 0.305 mm This is a scale used in Germany for pre-finished airliner models. Herpa and Hogan Wings produces several models in this ...

  5. Qi (standard) - Wikipedia

    en.wikipedia.org/wiki/Qi_(standard)

    Qi (/ tʃ iː / CHEE) is an open standard for inductive charging developed by the Wireless Power Consortium.It allows compatible devices, such as smartphones, to receive power when placed on a Qi charger, which can be effective over distances up to 4 cm (1.6 in). [1]

  6. Inch - Wikipedia

    en.wikipedia.org/wiki/Inch

    2.54 centimeters (1 inch is exactly 2.54 cm) 25.4 millimetres ... Johansson's compromise was to manufacture gauge blocks with a nominal size of 25.4mm, ...

  7. Optimum HDTV viewing distance - Wikipedia

    en.wikipedia.org/wiki/Optimum_HDTV_viewing_distance

    Find the optimal distance for a given screen. Example: for a 4K UHD screen 140 cm high (112 inches diagonal), the optimal distance is 140 × 1.6 = 224 cm. Find the right screen size. Example: for a 1080 HDTV used at a distance of 250 cm, you need to find a screen whose height is close to ⁠ 250 / 3.2 ⁠ = 78 cm (63 inches diagonally).

  8. Aspect ratio (image) - Wikipedia

    en.wikipedia.org/wiki/Aspect_ratio_(image)

    Some European countries have 1. 6:1 ... the 2018 iPad Pro 11-inch uses a 1.43:1 ... which fits the common print paper size of 8 in × 10 in (20.3 cm × 25.4 cm ...

  9. United States Army Special Forces - Wikipedia

    en.wikipedia.org/wiki/United_States_Army_Special...

    The metal Special Forces Tab replica comes in two sizes, full and dress miniature. The full size version measures 5 ⁄ 8 inch (1.6 cm) in height and 1 + 9 ⁄ 16 inches (4.0 cm) in width. The miniature version measures 1 ⁄ 4 inch (0.64 cm) in height and 1 inch (2.5 cm) in width.