File:Rusophycus Wisniowka3.jpg

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Rusophycus_Wisniowka3.jpg ‎(792 × 552 pixels, file size: 426 KB, MIME type: image/jpeg)

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Description
English: Two overlapping specimen of trilobite resting traces Rusophycus polonicus (Cruziana polonica) at the lower surface of an Upper Cambrian sandstone slab from Wiśniówka Duża quarry (Holy Cross Mts., SE-Poland). Diameter of coin: 23 mm.
Deutsch: Zwei sich überlagernde Exemplare der Trilobitenruhespur Rusophycus polonicus (Cruziana polonica) an der Unterseite einer Sandsteinplatte aus dem Oberkambrium des Steinbruches Wiśniówka Duża (Heiligkreuzgebirge, südöstliches Polen). Münzdurchmesser: 23 mm.
Polski: Rusophycus polonicus (ślad spoczynku trylobita) z górnokambryjskich osadów kamieniołomu Wiśniówka Duża koło Kielc. Średnica monety 23 mm
Date
Source Own work
Author Robert Niedźwiedzki
Permission
(Reusing this file)		 CC
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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Date/TimeThumbnailDimensionsUserComment
current23:06, 8 February 2010Thumbnail for version as of 23:06, 8 February 2010792 × 552 (426 KB)Robert Niedźwiedzki (talk | contribs){{Information |Description={{en|1=Rusophycus (the resting trace of trilobite) from the Upper Cambrian deposits from the Wiśniówka Duża quarry (Poland).}} {{pl|1=Rusophycus (ślad spoczynku trylobita) z górnokambryjskich osadów kamieniołomu Wiśniów

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