Image:Iowa Pleistocene snail penny.jpg

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Iowa_Pleistocene_snail_penny.jpg‎ (160 × 207 pixels, file size: 9 KB, MIME type: image/jpeg)

This image has currency in it to indicate scale. The coin depicted has a diameter of 19 millimetres (0.75 in).

Using objects such as coins for scale is discouraged, as they 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 are particularly bad as they can reinforce a geographical bias, and some coins' designs are not free content.

If possible, upload a photograph of the subject using ruler for scale (example) or add a scale marking via an image editor instead (example). SI/metric units are the most commonly used worldwide (see metre, 1 E-2 m).

Common coin diameters for reference:
U.S. dollar: 1¢: 19 mm, 0.75 in; 5¢: 21 mm, 0.84 in; 10¢: 18 mm, 0.71 in; 25¢: 24 mm, 0.96 in; 50¢: 31 mm, 1.21 in; $1: 26.5 mm, 1.04 in.	Canadian dollar: 1¢: 19 mm, 0.75 in; 5¢: 21 mm, 0.83 in; 10¢: 18 mm, 0.71 in; 25¢: 24 mm, 0.94 in; 50¢: 27 mm, 1.07 in; $1: 26.5 mm, 1.04 in; $2: 28 mm, 1.10 in.	Pound sterling: 1p: 20.32 mm, 0.80 in; 2p: 25.91 mm, 1.02 in; 5p: 18.00 mm, 0.71 in; 10p: 24.50 mm, 0.96 in; 20p: 21.40 mm, 0.84 in; 50p: 27.30 mm, 1.07 in; £1: 22.50 mm, 0.89 in; £2: 28.40 mm, 1.12 in.	Euro: 1c: 16.25 mm, 0.64 in; 2c: 18.75 mm, 0.74 in; 5c: 21.25 mm, 0.84 in; 10c: 19.75 mm, 0.78 in; 20c: 22.25 mm, 0.88 in; 50c: 24.25 mm, 0.95 in; €1: 23.25 mm, 0.92 in; €2: 25.75 mm, 1.01 in.

Iowa Pleistocene Snail, Endangered.

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This work has been released into the public domain by the copyright holder. This applies worldwide.

In case this is not legally possible:

The copyright holder grants any entity the right to use this work for any purpose, without any conditions, unless such conditions are required by law.

http://www.iowadnr.com/other/images/snail.jpg
Any person is hereby authorized to view, copy, print, and distribute documents on this site without condition. We ask you to extend the courtesy of crediting the material to the Iowa Department of Natural Resources.

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	Date/Time	Dimensions	User	Comment
current	07:23, 16 August 2005	160×207 (9 KB)	SEWilco (Talk \| contribs)	(Iowa Pleistocene Snail, Endangered. == Source == {{NoRightsReserved}} * http://www.iowadnr.com/other/images/snail.jpg * Any person is hereby authorized to view, copy, print, and distribute documents on this site without condition. We ask you to exten)