A picture showing one grain of pure gold and size comparisons with a 5 British pence, 20 euro cent, 10 yen and 25 U.S. cent coins. Also shown is a tape measure with Metric units on the bottom showing the diameter of the grain gold piece. The measured diameter is 3.18 mm or 1/8 inch.
Using coins for scale is discouraged as it will require people unfamiliar with them to look up the dimensions or guess, both of which defeat the purpose of the object in the first place. Coins can also reinforce a geographical bias, and some coins' designs are copyrighted.
Ideally, a photograph should include a ruler with the subject (example) or an added scale marking.
SI ("metric") units are the most commonly used worldwide (see meter and centimeter).
Isik, kes sidus teose selle litsentsiga, on andnud teose avalikku omandisse, loobudes üleilmselt seadusega lubatud ulatuses kõigist õigustest, mis tulenevad autoriõigusseadusest, sealhulgas autoriõigusega kaasnevatest õigustest ja naaberõigustest. Tohid teost kopeerida, muuta, levitada ja esitada; seda kõike luba küsimata ja ka ärilisel eesmärgil.
http://creativecommons.org/publicdomain/zero/1.0/deed.enCC0Creative Commons Zero, Public Domain Dedicationfalsefalse