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  2. List of cartridges by caliber - Wikipedia

    en.wikipedia.org/wiki/List_of_cartridges_by_caliber

    Calibers in the size range of (mm, inches): 2 mm (.079+ caliber) 3 mm (.118+ caliber) 4 mm (.157+ caliber) 5 mm (.197+ caliber) 6 mm (.236+ caliber) 7 mm (.276+ caliber)

  3. List of scale model sizes - Wikipedia

    en.wikipedia.org/wiki/List_of_scale_model_sizes

    2.381 mm A few rockets and some fit-in-the-box aircraft are made to this size. 1:120: 0.1 in: 2.54 mm: Model railways (TT) Derived from the scale of 1 inch equals 10 feet.TT model railroad scale. Used in AD&D Battlesystem Skirmishes rules. Works with 15 mm miniatures where a 6 foot man would equal 15.24 mm 1:110: 2.771 mm

  4. 6 mm caliber - Wikipedia

    en.wikipedia.org/wiki/6_mm_caliber

    2.3.264 in (6.6 mm) and up. 3 See also. 4 References. Toggle the table of contents. ... Measurements are in millimeters then inches, i.e. mm (in). Pistol cartridges

  5. Millimetre - Wikipedia

    en.wikipedia.org/wiki/Millimetre

    Different lengths as in respect to the electromagnetic spectrum, measured by the metre and its derived scales.The microwave is between 1 meter to 1 millimeter.. The millimetre (international spelling; SI unit symbol mm) or millimeter (American spelling) is a unit of length in the International System of Units (SI), equal to one thousandth of a metre, which is the SI base unit of length.

  6. French catheter scale - Wikipedia

    en.wikipedia.org/wiki/French_catheter_scale

    Thus, the outer diameter of a catheter in millimeters can be calculated by dividing the French size by 3. [2] For example, a catheter with a French size of 9 would have an outer diameter of approximately 3 mm. While the French scale aligns closely with the metric system, it introduces redundancy and the potential for rounding errors.

  7. Traditional point-size names - Wikipedia

    en.wikipedia.org/wiki/Traditional_point-size_names

    ⁠3 + 1 / 2 ⁠ ≈ 1.235 mm: Ruby Brilliant [12] 4 ≈ 1.411 mm: Brilliant Perle: Diamant Halbpetit [8] Robijn Diamant Halve petit ⁠4 + 1 / 4 ⁠ ≈ 1.499 mm: Gem ⁠4 + 1 / 2 ⁠ ≈ 1.588 mm: Diamond 5 ≈ 1.764 mm: Pearl Parisienne Sédanoise: Perl: Parel Parisienne 八: Bā "Eight" ⁠5 + 1 / 2 ⁠ ≈ 1.940 mm: Agate Ruby [13] [14 ...

  8. Inch - Wikipedia

    en.wikipedia.org/wiki/Inch

    Subdivisions of an inch are typically written using dyadic fractions with odd number numerators; for example, two and three-eighths of an inch would be written as ⁠2 + 3 / 8 ⁠ ″ and not as 2.375″ nor as ⁠2 + 6 / 16 ⁠ ″. However, for engineering purposes fractions are commonly given to three or four places of decimals and have been ...

  9. List of drill and tap sizes - Wikipedia

    en.wikipedia.org/wiki/List_of_drill_and_tap_sizes

    Example (inch, fine): For 7 ⁄ 16-20 (same diameter as the previous example, but this time with 20 threads per inch, which is considered fine), 0.437 in × 0.90 = 0.393 in (i.e., if the threads are to be fine, then a slightly larger diameter drill bit should be used before tapping the hole for the screw).