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  2. List of electronic component packaging types - Wikipedia

    en.wikipedia.org/wiki/List_of_electronic...

    The codes given in the chart below usually tell the length and width of the components in tenths of millimeters or hundredths of inches. For example, a metric 2520 component is 2.5 mm by 2.0 mm which corresponds roughly to 0.10 inches by 0.08 inches (hence, imperial size is 1008).

  3. Joint European standard for size labelling of clothes

    en.wikipedia.org/wiki/Joint_European_standard...

    European Standard (EN 13402-1) pictogram example for a men's jacket, with chest as primary measurement, and height and waist as secondary measurements. The first part [ 2 ] of the standard defines the list of body dimensions to be used for designating clothing sizes, together with an anatomical explanations and measurement guidelines.

  4. 1951 USAF resolution test chart - Wikipedia

    en.wikipedia.org/.../1951_USAF_resolution_test_chart

    A USAF 1951 resolution chart in PDF format is provided by Yoshihiko Takinami. This chart should be printed such that the side of the square of the 1st element of the group -2 should be 10 mm long. USAF 1951 Resolution Target Further explanations and examples; Koren 2003: Norman Koren's updated resolution chart better suited for computer analysis

  5. Body roundness index - Wikipedia

    en.wikipedia.org/wiki/Body_roundness_index

    The BRI models the human body shape as an ellipse (an oval), with the intent to relate body girth with height to determine body roundness. A simple tape measure suffices to obtain waist circumference and height. [1] [2] Waist circumference and height can be in any unit of length, as long as they both use the same one. [1] [3

  6. Microscope slide - Wikipedia

    en.wikipedia.org/wiki/Microscope_slide

    A set of standard 75 by 25 mm microscope slides. The white area can be written on to label the slide. A microscope slide (top) and a cover slip (bottom) A microscope slide is a thin flat piece of glass, typically 75 by 26 mm (3 by 1 inches) and about 1 mm thick, used to hold objects for examination under a microscope.

  7. United States customary units - Wikipedia

    en.wikipedia.org/wiki/United_States_customary_units

    Thickness of aluminum foil is measured in mils (1 ⁄ 1000 inch, or 0.0254 mm) in the United States. Cross-sectional area of electrical wire is measured in circular mils in the U.S. and Canada, one circular mil (cmil) being equal to 5.067 × 10 −4 mm 2 (or 7.854 × 10 −7 in 2). Since this is so small, actual wire is commonly measured in ...

  8. ISO/IEC 7810 - Wikipedia

    en.wikipedia.org/wiki/ISO/IEC_7810

    All card sizes have a thickness of 760 ± 80 μm, i.e. minimum 0.68 millimetres (0.027 in) and maximum 0.84 millimetres (0.033 in).. The standard defines both metric and imperial measurements, noting that: [4]

  9. List of measuring instruments - Wikipedia

    en.wikipedia.org/wiki/List_of_measuring_instruments

    Established standard objects and events are used as units, and the process of measurement gives a number relating the item under study and the referenced unit of measurement. Measuring instruments, and formal test methods which define the instrument's use, are the means by which these relations of numbers are obtained.