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  2. United States Mint coin sizes - Wikipedia

    en.wikipedia.org/wiki/United_States_Mint_coin_sizes

    15.5 mm 1.24 g 1794–1873 Dollar 15 mm 1.67 gr ... Images are close to actual size on a 92-dpi monitor. ... Some variances in coin size and weight occurred over time ...

  3. Orders of magnitude (length) - Wikipedia

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

    1.5 mm – average length of a flea [27] 2.54 mm – distance between pins on old dual in-line package (DIP) electronic components; 5 mm – length of an average red ant; 5 mm – diameter of an average grain of rice; 5.56×45mm NATO – standard ammunition size; 6 mm – approximate width of a pencil

  4. 5 mm caliber - Wikipedia

    en.wikipedia.org/wiki/5_mm_caliber

    5 mm caliber; Examples of 5 mm cartridges, .22 Short (left) and .22 Long Rifle (5.6×10mmR and 5.6×15mmR)

  5. Caliber - Wikipedia

    en.wikipedia.org/wiki/Caliber

    Shotguns are classed according to gauge, a related expression. The gauge of a shotgun refers to how many lead spheres, each with a diameter equal to that of the bore, that amounts to one pound (454 g (1.0 lb)) in weight. In the case of a 12-gauge (18.5 mm) shotgun, it would take 12 spheres the size of the shotgun's bore to equal a pound. [12]

  6. French catheter scale - Wikipedia

    en.wikipedia.org/wiki/French_catheter_scale

    The French scale measures the outer diameter of the catheter, not the size of the internal drainage channel (inner diameter). For instance, a two-way catheter of 20 Fr and a three-way catheter of 20 Fr have the same outer diameter, but the three-way catheter has an additional channel for irrigation, reducing the size of its drainage channel.

  7. American Gold Eagle - Wikipedia

    en.wikipedia.org/wiki/American_Gold_Eagle

    Offered in 1/10 oz, 1/4 oz, 1/2 oz, and 1 oz denominations, these coins are guaranteed by the U.S. government to contain the stated amount of actual gold weight in troy ounces. By law, the gold must come from sources in the United States, alloyed with silver and copper to produce a more wear-resistant coin.

  8. List of unusual units of measurement - Wikipedia

    en.wikipedia.org/wiki/List_of_unusual_units_of...

    An Olympic-size swimming pool holds over 2 acre-feet of water For larger volumes of liquid, one measure commonly used in the media in many countries is the Olympic-size swimming pool. [47] A 50 m × 25 m (164 ft × 82 ft) Olympic swimming pool, built to the FR3 minimum depth of 2 metres (6.6 ft) would hold 2,500 m 3 (660,000 US gal).

  9. Traditional point-size names - Wikipedia

    en.wikipedia.org/wiki/Traditional_point-size_names

    size American system Continental system Chinese system American [4] British [1] French [5] German [6] Dutch Character Pinyin Meaning 1 ≈ 0.353 mm: American [a] Achtelpetit: Achtste petit ⁠1 + 1 / 2 ⁠ ≈ 0.529 mm: German: Achtelcicero: Achtste cicero 2 ≈ 0.706 mm: Saxon: Non Plus Ultra [8] Viertelpetit: Non plus ultra [9] Vierde petit ...