File:Pupal cases with adult Rhynchophorus ferrugineus.JPG

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English: Pupal cases of the red palm weevil, Rhynchophorus ferrugineus, taken from the bases of fallen leaves of a Canary Island date palm, Phoenix canariensis. The cases have been opened and show hatched adult weevils, ready to leave the cases when temperatues are sufficiently high. Near Alistro, Corsica, 30 Dec 2012. The coin is a one Euro coin, diameter 23.25 mm.
Deutsch: Puppenwiegen des Roten Palmenrüsslers Rhynchophorus ferrugineus, aus den Basen herabgefallener Wedel der Kanarischen Dattelpalme, Phoenix canariensis. The Wiegen wurden geöffnet und zeigen erwachsene Rüsselkäfer, bereit, die Wiegen zu verlassen sobald die Temperaturen es erlauben. Nahe Alistro, Korsika, 30 Dez 2012. Die Münze ist eine Ein-Euro-Münze, Durchmesser 23,25.
Français : Charançon rouge des palmiers (Rhynchophorus ferrugineus): Loges de nymphose ouvrées avec des adultes. Près d'Alistro, Corse, 30 Déc 2012.
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Author Küchenkraut
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).

Images with coins to indicate scale

Common coin diameters for reference:

  • U.S. dollar (as of?):
    • 1¢: 19.05 mm, 0.75 in
    • 5¢: 21.21 mm, 0.84 in
    • 10¢: 17.91 mm, 0.71 in
    • 25¢: 24.26 mm, 0.94 in
    • 50¢: 30.61 mm, 1.22 in
    • $1: 26.5 mm, 1.02 in
  • Canadian dollar (as of?):
    • 1¢: 19.05 mm, 0.75 in
    • 5¢: 21.2 mm, 0.83 in
    • 10¢: 18.03 mm, 0.71 in
    • 25¢: 23.88 mm, 0.94 in
    • 50¢: 27.13 mm, 1.07 in
    • $1: 26.5 mm, 1.02 in
    • $2: 28 mm, 1.1 in
  • Pound sterling as of 2021:
    • 1p: 20.32 mm, 0.8 in
    • 2p: 25.91 mm, 1.02 in
    • 5p: 18 mm, 0.71 in
    • 10p: 24.5 mm, 0.96 in
    • 20p: 21.4 mm, 0.84 in
    • 50p: 27.3 mm, 1.07 in
    • £1: 23.03–23.43 mm, 0.91–0.92 in
    • £2: 28.4 mm, 1.12 in
  • Euro as of 2002:
    • 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

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current20:17, 30 December 2012Thumbnail for version as of 20:17, 30 December 20121,893 × 1,281 (686 KB)Küchenkraut (talk | contribs)User created page with UploadWizard

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