The large drive is a 5.25" full-height 111 MB MFM drive. The smaller drive is a 2.5" 6495 MB IDE drive. The coins at bottom are a US cent (left, 19 mm) and a UK penny for size comparison.
* 17:50, 25 June 2006 [[:en:User:Redgrittybrick|Redgrittybrick]] 640×512 (123,021 bytes) <span class="comment">((Photo by Ian Wilson))</span>
This image has currency in it to indicate scale.
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).
{{Information| |Description=The large drive is a 5.25" full-height 111 MB MFM drive. The smaller drive is a 2.5" 6495 MB IDE drive. The coins are a US cent and a UK penny for size comparison. |Source=Photo by Ian Wilson |Date= |Author=User [[:en:User:Redg