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).
In case this is not legally possible: Ptelea grants anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.
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The original description page was here. All following user names refer to en.wikipedia.
2010-05-24 11:54 Ptelea 2044×2861 (3312857 bytes) {{Information |Description = Photo of leaf of elm cultivar 'Morfeo' with 1 Euro coin as scale |Source = I (~~~) created this work entirely by myself. |Date = ~~~~~ |Author = ~~~~ |other_versions = None }}
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