The large drive is a 5.25" full-height 111 MB MFM drive. The smaller drive is a 2.5" 6495 MB IDE drive. The coins at bottom are a US cent (left, 19 mm) and a UK penny for size comparison.
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Originally from en.wikipedia; description page is (was) here
* 17:50, 25 June 2006 [[:en:User:Redgrittybrick|Redgrittybrick]] 640×512 (123,021 bytes) <span class="comment">((Photo by Ian Wilson))</span>
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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{{Information| |Description=The large drive is a 5.25" full-height 111 MB MFM drive. The smaller drive is a 2.5" 6495 MB IDE drive. The coins are a US cent and a UK penny for size comparison. |Source=Photo by Ian Wilson |Date= |Author=User [[:en:User:Redg
ไฟล, inch, hard, disk, drive, ไฟล, ประว, ไฟล, หน, าท, ภาพน, การใช, ไฟล, วนกลาง, อม, ลเก, ยวก, บภาพไม, ภาพท, รายละเอ, ยดส, งกว, าน, inch, hard, disk, drive, 8206, กเซล, ขนาดไฟล, โลไบต, ชน, ดไมม, image, jpeg, ปภาพหร, อไฟล, เส, ยงน, นฉบ, บอย, คอมมอนส, รายละเอ, ยด. ifl prawtiifl hnathimiphaphni karichiflswnklang khxmulekiywkbphaphimmiphaphthimiraylaexiydsungkwani 5 25 inch MFM hard disk drive JPG 8206 640 512 phikesl khnadifl 120 kiolibt chnidimm image jpeg rupphaphhruxiflesiyngni tnchbbxyuthi khxmmxns raylaexiyddanlang epnkhxkhwamthiaesdngphlcak ifltnchbbinkhxmmxns khxmmxnsepnewbistinokhrngkarsahrbekbrwbrwmsuxesri thi khunsamarthchwyid khaxthibay5 25 inch MFM hard disk drive JPG The large drive is a 5 25 full height 111 MB MFM drive The smaller drive is a 2 5 6495 MB IDE drive The coins at bottom are a US cent left 19 mm and a UK penny for size comparison wnthi 25 mithunayn ph s 2549aehlngthima Photo by Ian Wilsonphusrangsrrkh User Redgrittybrick on en wikipediakarxnuyat karichiflniihm khapheca inthanaphuthuxlikhsiththikhxngphaphhruxsuxni xnuyatihichphaphhruxsuxniphayitenguxnikhtxipni xnuyatihkhdlxk aeckcayaela hruxddaeprexksarniphayitenguxnikhkhxngsyyaxnuyatexksaresrikhxngknu run 1 2 hruxrunid nbcaknithixxkodymulnithisxftaewresri odyimmiswnidhamaekikh immikhxkhwampkhnaaelapkhlng saenakhxngsyyaxnuyatrwmxyuinswnchux syyaxnuyatexksaresrikhxngknuhttp www gnu org copyleft fdl html GFDL GNU Free Documentation License true trueiflnixyuphayitsyyaxnuyat khriexthifkhxmmxns aebbaesdngthima xnuyataebbediywkn 3 0 tnchbbkhunsamarth thicaaebngpn thicathasaena aeckcay aelasngngandngklawtxip thicaeriyberiyngihm thicaddaeplngngandngklaw phayitenguxnikhtxipni aesdngthima khuntxngihekiyrtiecakhxngnganxyangehmaasm odyephimlingkipyngsyyaxnuyat aelarabuhakmikarepliynaeplng khunxacthaechnniidinrupaebbidkidtamkhwr aettxngimichinlksnathiaenawaphuihxnuyatsnbsnunkhunhruxkarichngankhxngkhun xnuyataebbediywkn hakkhunddaeplng epliynrup hruxtxetimnganni khuntxngichsyyaxnuyataebbediywknhruxaebbthiehmuxnkbsyyaxnuyatthiichkbnganniethannpayaesdngsthanalikhsiththinithukephimephuxihepniptamkarepliynaeplngsyyaxnuyatkhxngmulnithiwikimiediy cak GFDL ipyng GFDL khwbkhukb CC BY SA 3 0 http creativecommons org licenses by sa 3 0 CC BY SA 3 0 Creative Commons Attribution Share Alike 3 0 true trueiflnixyuphayitsyyaxnuyatkhriexthifkhxmmxns runaesdngthima 2 5 thwipkhunsamarth thicaaebngpn thicathasaena aeckcay aelasngngandngklawtxip thicaeriyberiyngihm thicaddaeplngngandngklaw phayitenguxnikhtxipni aesdngthima khuntxngihekiyrtiecakhxngnganxyangehmaasm odyephimlingkipyngsyyaxnuyat aelarabuhakmikarepliynaeplng khunxacthaechnniidinrupaebbidkidtamkhwr aettxngimichinlksnathiaenawaphuihxnuyatsnbsnunkhunhruxkarichngankhxngkhunhttps creativecommons org licenses by 2 5 CC BY 2 5 Creative Commons Attribution 2 5 true truekhunsamartheluxksyyaxnuyatdngklawtamtxngkarewxrchnxun Originally from en wikipedia description page is was here 17 50 25 June 2006 en User Redgrittybrick Redgrittybrick 640 512 123 021 bytes lt span class comment gt Photo by Ian Wilson lt span gt 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 khabrryayodyyxithyephimkhabrryaythrrthdediywephuxkhyaykhwamwaiflnimixairixethmthiaesdngxyuiniflniprakxbdwysthanalikhsiththimilikhsiththisyyaxnuyatCreative Commons Attribution 2 5 Generic xngkvsCreative Commons Attribution ShareAlike 3 0 Unported xngkvsGNU Free Documentation License version 1 2 or later xngkvswnthisrang wnkxtng25 mithunayn 2006bnthukphaphdwyNikon D50 xngkvs prawtiifl khlikwnthi ewlaephuxduiflthipraktinkhnann wnthi ewlarupyxkhnadphuichkhwamehn pccubn02 41 25 krkdakhm 2549640 512 120 kiolibt Liftarn Information Description The large drive is a 5 25 full height 111 MB MFM drive The smaller drive is a 2 5 6495 MB IDE drive The coins are a US cent and a UK penny for size comparison Source Photo by Ian Wilson Date Author User en User Redg hnathimiphaphni hnatxipni oyngmathiphaphni harddisk karichiflswnklang wikixuntxipniichiflni karichbn azb wikipedia org مکستور karichbn de wikipedia org Formfaktor Computertechnik Festplattenlaufwerk Wikipedia Auskunft Archiv 2011 Woche 03 karichbn en wikipedia org Hard disk drive Maxtor ST506 ST412 User Hripsime Ashikyan List of disk drive form factors karichbn es wikipedia org Unidad de disco duro karichbn fa wikipedia org درایو دیسک سخت karichbn fi wikipedia org Maxtor karichbn hi wikipedia org ह र ड ड स क ड र इव karichbn hr wikipedia org Tvrdi disk karichbn incubator wikimedia org Wp anp ह र ड ड स क ड र इव karichbn kn wikipedia org ಹ ರ ಡ ಡ ಸ ಕ ಡ ರ ವ karichbn ko wikipedia org 하드 디스크 드라이브 karichbn pt wikipedia org Unidade de disco rigido karichbn ru wikipedia org Form faktor tehnika karichbn sk wikipedia org Pevny disk karichbn sr wikipedia org Hard disk karichbn tt wikipedia org Katy disk karichbn uk wikipedia org Zhorstkij disk Form faktor karichbn vi wikipedia org Ổ đĩa cứng karichbn www wikidata org Q65037418khxmulekiywkbphaph phaphnimikhxmulephimetim sungswnihymacakklxngdicitxlhruxsaeknenxrthisamarthekbkhxmuldngklawiwrwmkbphaphid thaphaphnithukprbprungaekikhhruxepliynaeplngcakedim khxmulbangxyangcayngkhngimepliynaeplngehmuxnphaphthithukprbprungaekikhnnphuphlitklxngNIKON CORPORATIONrunkhxngklxngNIKON D50ewlaepidhnaklxng1 10 winathi 0 1 khaexff 9ewlathibnthukphaph17 36 25 mithunayn 2549khwamyawofkselns55 mm phuthayPicasa 2 0karcdwangphaph0khwamlaexiydaenwnxn300 dpikhwamlaexiydaenwtng300 dpisxftaewrthiichVer 1 00aekikhphaphlasud17 36 25 mithunayn 2549taaehnng Y aela CCo sitedopraekrmexksophechxropraekrmpktirunexksif Exif 2 21ewlathiaeplngepndicithl17 36 25 mithunayn 2549khwamhmaykhxngaetlakhxmophenntY Cb Cr immikhaohmdkarbibxdphaph4karchdechyaesng0rurbaesngkwangsud5 APEX f 5 66 ohmdkarwdaesngaephtethirnaesngimthrabaeflchimichaeflchkhwamehnphuichIan Wilsonrunaeflchphiksthirxngrb1sepssiimidprbethiybwithikarwdesnesxrcudediywtnchbbiflklxngthayphaphningdicithlchnidsinphaphthayodytrngkarpramwlphaphophlessspktiohmdexksophechxrexksophechxrxtonmtiiwtbalansiwtbalansxtonmtidicithlsum1rayaofksinfilm 35 mm 82 mm chnidsinaekhpecxrpktisinkhxnothrlekn ta khunkhwamepribbtangpktikhwamximsipktikhwamkhmpktirayahangwtthuimthrabkhxmulsahrbtidtx lt picasastamp gt ekhathungcak https th wikipedia org wiki ifl 5 25 inch MFM hard disk drive JPG, wikipedia, วิกิ หนังสือ, หนังสือ, ห้องสมุด,
