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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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 Deutsch nbsp English nbsp espanol nbsp francais nbsp Gaeilge nbsp italiano nbsp Plattduutsch nbsp portugues nbsp sicilianu nbsp svenska nbsp suomi nbsp makedonski nbsp russkij nbsp മലയ ള nbsp 한국어 nbsp 日本語 nbsp 中文 nbsp 中文 简体 nbsp עברית nbsp karxnuyatichsiththi Public domain Public domain false false khapheca phuthuxlikhsiththiinnganni khxmxbnganihepnsatharnsmbti prakasnimiphlthwolkinbangpraeths karkrathadngklawxacimsamarththaidtamkdhmaykhaphecaxnuyatihthukkhnmisiththiinkarichiflniinthukehtuphlkarich odyimmimienguxnikh ewnaetkdhmayimxnuyatihthaechnnnkhabrryayodyyxithyephimkhabrryaythrrthdediywephuxkhyaykhwamwaiflnimixairixethmthiaesdngxyuiniflniprakxbdwyphusrangbangkhathiimmiixethmwikisnethschuxphuichwikimiediy Axefan2yuxaraexl https commons wikimedia org wiki user Axefan2chuxphusrangsrrkh Axefan2sthanalikhsiththicopyrighted dedicated to the public domain by copyright holder nbsp xngkvssyyaxnuyatreleased into the public domain by the copyright holder nbsp xngkvsthimakhxngiflkarsrangdngedimodyphuxpohldmedia type nbsp xngkvsimage jpegchecksum nbsp xngkvs7555c44458f07b3d3ba32b36f222ee2d963c2c3dwithikarkahnd SHA 1 nbsp xngkvsdata size nbsp xngkvs45 174 ibtkhwamsung562 phikeslkhwamkwang482 phikesl prawtiifl khlikwnthi ewlaephuxduiflthipraktinkhnann wnthi ewlarupyxkhnadphuichkhwamehn pccubn05 28 2 phvscikayn 2555482 562 44 kiolibt Doc JamesBetter background 23 34 14 mkrakhm 2553482 562 55 kiolibt Axefan2 Information Description en 1 A typical contraceptive diaphragm Source own Author Axefan2 Date Permission other versions hnathimiphaphni hnatxipni oyngmathiphaphni karkhumkaenid karichiflkhamokhrngkar wikixuntxipniichiflni karichbn ar wikipedia org تحديد النسل حركة تحديد النسل في الولايات المتحدة مستخدم CFCF ملعب تحديد النسل عازل أنثوي مستخدم Tarawneh التحكم بالولادة karichbn arz wikipedia org تحديد النسل karichbn as wikipedia org জন ম ন য ন ত ৰণ karichbn bg wikipedia org Diafragma kontraceptivna Kontracepciya karichbn ca wikipedia org Diafragma anticonceptiu karichbn cs wikipedia org Antikoncepce Wikipedista Doc James BC Posevni diafragma karichbn cy wikipedia org Diaffram atal cenhedlu karichbn da wikipedia org Pessar karichbn de wikipedia org Vagina des Menschen Pessar Benutzer Artikelstube Liste therapeutischer Verfahren karichbn de wiktionary org Diaphragma karichbn el wikipedia org Antisyllhpsh karichbn el wiktionary org diafragma karichbn en wikipedia org Diaphragm birth control Birth control Birth control movement in the United States User Doc James BCP karichbn en wikiversity org Federal Writers Project Life Histories 2015 Fall Section 020 Rosa Lee Johnson karichbn eo wikipedia org Pesario Kontraŭkoncipilo karichbn es wikipedia org Anticoncepcion Diafragma anticonceptivo Usuario MariaJoseFelgueresPlanells borrador5 BirthControl Movimiento de control de la natalidad en los Estados Unidos karichbn eu wikipedia org Antisorgailu Diafragma antikontzeptibo karichbn fa wikipedia org جنبش پیشگیری از بارداری ایالات متحده دیافراگم پیشگیری از بارداری karichbn fr wikipedia org Diaphragme contraception karichbn gu wikipedia org ગર ભન ર ધ karichbn he wikipedia org דיאפרגמה karichbn hi wikipedia org स तत न र ध karichbn hr wikipedia org Kontracepcija karichbn hu wikipedia org Pesszarium Szuletesszabalyozas karichbn hy wikipedia org Մասնակից Tigran bazarchyan Ավազարկղ Դիաֆրագմա խտրոց Բեղմնականխում karichbn id wikipedia org Pengaturan kelahiran Diafragma kontrasepsi karichbn it wikipedia org Contraccezione Movimento per il controllo delle nascite negli Stati Uniti d America dukarichkhamokhrngkarephimetimkhxngiflnikhxmulekiywkbphaph phaphnimikhxmulephimetim sungswnihymacakklxngdicitxlhruxsaeknenxrthisamarthekbkhxmuldngklawiwrwmkbphaphid thaphaphnithukprbprungaekikhhruxepliynaeplngcakedim khxmulbangxyangcayngkhngimepliynaeplngehmuxnphaphthithukprbprungaekikhnnkhwamkwang482 phikeslkhwamsung562 phikeslbittxkhxmophennt8 8 8phikeslkhxmophsichnRGBkarcdwangphaphpkticanwnkhxmophennt3khwamlaexiydaenwnxn300 dpikhwamlaexiydaenwtng300 dpisxftaewrthiichAdobe Photoshop CS6 Windows aekikhphaphlasud10 35 30 tulakhm 2555runexksif Exif 2 21sepssiimidprbethiybID echphaakhxngexksartnchbb8889DE3FEE9834EF2D084EA81300EAA0ewlathiaeplngepndicithl17 34 28 tulakhm 2555wnthiaekikhkhxmulemtalasud03 35 30 tulakhm 2555 ekhathungcak https th wikipedia org wiki ifl Contraceptive diaphragm jpg, wikipedia, วิกิ หนังสือ, หนังสือ, ห้องสมุด,
