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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คำอธิบายSiamosaurus tooth by PaleoGeek.png
English: Drawing of the Siamosaurus holotype tooth[1] with a British penny for size comparison. Measurements from Buffetaut & Ingavat
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ไฟล์อื่นที่ใช้ไฟล์นี้: Siamosaurus tooth by PaleoGeek (transparent).png
Buffetaut, E.; and Ingevat, R. (1986). Unusual theropod dinosaur teeth from the Upper Jurassic of Phu Wiang, northeastern Thailand. Rev. Paleobiol. 5: 217-220.
ไฟล, siamosaurus, tooth, paleogeek, ไฟล, ประว, ไฟล, หน, าท, ภาพน, การใช, ไฟล, วนกลาง, อม, ลเก, ยวก, บภาพขนาดของต, วอย, างน, กเซล, ความละเอ, ยดอ, กเซล, กเซล, กเซล, กเซล, ภาพท, ความละเอ, ยดส, งกว, 8206, กเซล, ขนาดไฟล, โลไบต, ชน, ดไมม, image, ปภาพหร, อไฟล, เส, ยง. ifl prawtiifl hnathimiphaphni karichiflswnklang khxmulekiywkbphaphkhnadkhxngtwxyangni 444 599 phikesl khwamlaexiydxun 178 240 phikesl 356 480 phikesl 569 768 phikesl 1 276 1 721 phikesl duphaphthimikhwamlaexiydsungkwa 8206 1 276 1 721 phikesl khnadifl 173 kiolibt chnidimm image png rupphaphhruxiflesiyngni tnchbbxyuthi khxmmxns raylaexiyddanlang epnkhxkhwamthiaesdngphlcak ifltnchbbinkhxmmxns khxmmxnsepnewbistinokhrngkarsahrbekbrwbrwmsuxesri thi khunsamarthchwyid khwamyx 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 inDeutsch English espanol francais Gaeilge italiano Plattduutsch portugues sicilianu svenska suomi makedonski russkij മലയ ള 한국어 日本語 中文 中文 简体 עברית khaxthibaySiamosaurus tooth by PaleoGeek png English Drawing of the Siamosaurus holotype tooth 1 with a British penny for size comparison Measurements from Buffetaut amp Ingavat 1 wnthi 10 mithunayn ph s 2561aehlngthima ngankhxngtwphusrangsrrkh PaleoGeekSquaredewxrchnxun iflxunthiichiflni Siamosaurus tooth by PaleoGeek transparent png karxnuyatichsiththi khapheca inthanaphuthuxlikhsiththikhxngphaphhruxsuxni xnuyatihichphaphhruxsuxniphayitenguxnikhtxipniiflnixyuphayitsyyaxnuyat khriexthifkhxmmxns aebbaesdngthima xnuyataebbediywkn 4 0 nanachatikhunsamarth thicaaebngpn thicathasaena aeckcay aelasngngandngklawtxip thicaeriyberiyngihm thicaddaeplngngandngklaw phayitenguxnikhtxipni aesdngthima khuntxngihekiyrtiecakhxngnganxyangehmaasm odyephimlingkipyngsyyaxnuyat aelarabuhakmikarepliynaeplng khunxacthaechnniidinrupaebbidkidtamkhwr aettxngimichinlksnathiaenawaphuihxnuyatsnbsnunkhunhruxkarichngankhxngkhun xnuyataebbediywkn hakkhunddaeplng epliynrup hruxtxetimnganni khuntxngichsyyaxnuyataebbediywknhruxaebbthiehmuxnkbsyyaxnuyatthiichkbnganniethannhttps creativecommons org licenses by sa 4 0 CC BY SA 4 0 Creative Commons Attribution Share Alike 4 0 true true Buffetaut E and Ingevat R 1986 Unusual theropod dinosaur teeth from the Upper Jurassic of Phu Wiang northeastern Thailand Rev Paleobiol 5 217 220 khabrryayodyyxithyephimkhabrryaythrrthdediywephuxkhyaykhwamwaiflnimixairixethmthiaesdngxyuiniflniprakxbdwyphusrangbangkhathiimmiixethmwikisnethschuxphusrangsrrkh PaleoGeekSquaredyuxaraexl https commons wikimedia org wiki user PaleoGeekSquaredchuxphuichwikimiediy PaleoGeekSquaredsthanalikhsiththimilikhsiththisyyaxnuyatCreative Commons Attribution ShareAlike 4 0 International xngkvsthimakhxngiflkarsrangdngedimodyphuxpohldwnthisrang wnkxtng10 mithunayn 2018 prawtiifl khlikwnthi ewlaephuxduiflthipraktinkhnann wnthi ewlarupyxkhnadphuichkhwamehn pccubn20 46 10 mithunayn 25611 276 1 721 173 kiolibt PaleoGeekSquaredUser created page with UploadWizard hnathimiphaphni hnatxipni oyngmathiphaphni syamomsxrs karichiflswnklang wikixuntxipniichiflni karichbn ca wikipedia org Siamosaure karichbn cs wikipedia org Siamosaurus karichbn de wikipedia org Siamosaurus karichbn en wikipedia org Siamosaurus Talk Siamosaurus 1986 in paleontology User PaleoGeekSquared Wikipedia WikiProject Dinosaurs Image review Archive May 2018 August 2018 Template Did you know nominations Siamosaurus karichbn es wikipedia org Siamosaurus suteethorni karichbn fr wikipedia org Siamosaurus Utilisateur LeLaisserPasserA38 Brouillon6 karichbn it wikipedia org Siamosaurus karichbn nl wikipedia org Siamosaurus karichbn pl wikipedia org Syjamozaur karichbn pt wikipedia org Siamosaurus karichbn sv wikipedia org Siamosaurus karichbn www wikidata org Q134636 karichbn zh wikipedia org 暹羅龍屬khxmulekiywkbphaph phaphnimikhxmulephimetim sungswnihymacakklxngdicitxlhruxsaeknenxrthisamarthekbkhxmuldngklawiwrwmkbphaphid thaphaphnithukprbprungaekikhhruxepliynaeplngcakedim khxmulbangxyangcayngkhngimepliynaeplngehmuxnphaphthithukprbprungaekikhnnkhwamlaexiydaenwnxn59 06 dpckhwamlaexiydaenwtng59 06 dpcsxftaewrthiichMicrosoft Office ekhathungcak https th wikipedia org wiki ifl Siamosaurus tooth by PaleoGeek png, wikipedia, วิกิ หนังสือ, หนังสือ, ห้องสมุด,
