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).
Selle teose autoriõiguste valdajana annan selle teose avalikku omandisse. See kehtib üleilmselt. Kui see pole mõnes riigis õiguslikult võimalik: Annan kõigile õiguse seda teost kasutada ükskõik mille jaoks, ilma ühegi tingimuseta, kui seadus neid just ei sea.
Pealdised
Lisa üherealine seletus sellest, mida fail esitab
Common rifle cartridges, from the largest .50 BMG to the smallest .22 LR
{{Information |Description=Rifle cartridges - L to R: .50 BMG, 300 Win Mag, .308 Winchester, 7.62 Russian Short, 5.56 NATO, .22 LR |Source=http://en.wikipedia.org/wiki/Image:Rifle_cartridge_comparison.jpg |Date=25 February 2006 |Author= Richard C. Wysong