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).
This work has been released into the public domain by its author, MadDreamChant at English Wikipedia. This applies worldwide. In some countries this may not be legally possible; if so: MadDreamChant grants anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.Public domainPublic domainfalsefalse
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2007-01-23 21:30 MadDreamChant 1420×1116×8 (430964 bytes) This photo was taken by Wikipedian MadDreamChant.
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{{Information |Description=The Gizmondo handheld video game unit. United States and British coins included for scale. This photo was taken by Wikipedian MadDreamChant. |Source=Originally from [http://en.wikipedia.org en.wikipedia]; descr