View source for Ring size

{{Short description|Tools for measuring ring and finger sizes}}
{{For|the "ring gauge" used for cigars (1/64 inch)|Cigar}}
{{original research|date=January 2014}}

[[File:Triboulet.jpg|thumb|An analogic sizing ring stick]]
'''Ring size''' is a measurement used to denote the circumference (or sometimes the diameter) of [[Ring (jewellery)|jewellery rings]] and [[smart ring]]s.

__TOC__

== Measuring tools ==
[[File:Ring sizer measuring tool 4.jpg|thumb|Plastic ring sizer tool for measuring the circumference of a finger in millimeters.]]
Ring sizes can be measured physically by a paper, plastic, or metal ring sizer (as a [[Gauge (instrument)|gauge]]) or by measuring the inner diameter of a ring that already fits.

Ring sticks are tools used to measure the inner size of a ring, and are typically made from plastic, [[delrin]], wood, aluminium, or of multiple materials. Digital ring sticks can be used for highly accurate measurements.

== Measurement systems ==
=== International standard ===
[[International Organization for Standardization|ISO]] 8653:2016 defines standard ring sizes in terms of the inner [[circumference]] of the ring measured in millimetres.<ref>{{Cite web|url=https://www.iso.org/standard/65408.html|title=ISO 8653:2016|website=ISO}}</ref> ISO sizes are used in [[Austria]], [[France]], [[Belgium]], [[Scandinavia]] ([[Norway]],<ref>{{Cite web |title=Ring and Bangle Size Charts {{!}} Norwegian Jewelry - Marketplace and Blog |url=https://norwegian.jewelry/pages/size-charts |access-date=2024-04-19 |website=Norwegian Jewelry |language=en}}</ref> [[Sweden]], [[Denmark]], [[Finland]], [[Iceland]]), and other countries in [[Continental Europe]].<ref name="auto">{{cite web | url=https://www.buchkosky.com/education/european_ring_size/ | title=European Ring Size Conversion - Buchkosky Jewelers }}</ref><ref name="auto1">{{Cite web |title=International Ring Size Conversion |url=https://www.larsonjewelers.com/pages/ring-size-conversion-chart |access-date=2024-04-19 |website=Larson Jewelers |language=en}}</ref>

{| class="wikitable" style="text-align: left;"
|+ Relationship between ISO size and internal diameter
! scope=row | ISO size (internal ring circumference, mm)
|49
|50
|51
|52
|53
|54
|55
|56
|57
|58
|59
|60
|61
|62
|63
|64
|65
|66
|67
|68
|69
|70
|71
|72
|-
! scope=row | Internal diameter (mm)
|{{#expr: 49/pi round 1}}
|{{#expr: 50/pi round 1}}
|{{#expr: 51/pi round 1}}
|{{#expr: 52/pi round 1}}
|{{#expr: 53/pi round 1}}
|{{#expr: 54/pi round 1}}
|{{#expr: 55/pi round 1}}
|{{#expr: 56/pi round 1}}
|{{#expr: 57/pi round 1}}
|{{#expr: 58/pi round 1}}
|{{#expr: 59/pi round 1}}
|{{#expr: 60/pi round 1}}
|{{#expr: 61/pi round 1}}
|{{#expr: 62/pi round 1}}
|{{#expr: 63/pi round 1}}
|{{#expr: 64/pi round 1}}
|{{#expr: 65/pi round 1}}
|{{#expr: 66/pi round 1}}
|{{#expr: 67/pi round 1}}
|{{#expr: 68/pi round 1}}
|{{#expr: 69/pi round 1}}
|{{#expr: 70/pi round 1}}
|{{#expr: 71/pi round 1}}
|{{#expr: 72/pi round 1}}
|-
|}

=== Other traditional and regional systems ===
[[File:Metal ring size set.jpg|thumb|Metal ring size set for measuring fingers.]]
Other ring size measurement systems are used in areas that do not use ISO 8653:2016.

==== North America ====
In the [[United States]], [[Canada]], and [[Mexico]], ring sizes are specified using a numerical scale with {{frac|1|4}} steps, where whole sizes differ by {{convert|0.032|in}} of internal diameter, equivalent to {{convert|{{#expr: 0.032*pi round 4}}|in}} of internal circumference. The relationship of this size (<math>s_{NA}</math>) to ISO 8653:2016 circumference (<math>C_{ISO}</math>) is <math>C_{ISO} = 2.55 \times s_{NA} + 36.5</math>, while the relationship to ISO 8653:2016 diameter (<math>d_{ISO}</math>) is <math>d_{ISO} = 0.8128 \times s_{NA} + 11.63</math>.

The Circular of the Bureau of Standards<ref>{{cite report |author=S.W. Stratton, Director |date=Jan 24, 1921 |title=Circular of the Bureau of Standards, No 43., Jewelers' and Silversmiths' Weights and Measures |publisher=United States Department of Commerce |page=39 }}</ref> summarizes the situation with this system: "While there apparently is only one standard in use in the United States, in reality, because of the lack of specific dimensions and because of the errors introduced by the adoption of a common commercial article as a pattern, there are many, although similar, standards."  The standards are generally consistent and remain so. There does not appear to have been any improvement in the standard since then.

==== Ireland, United Kingdom, Australia ====
In [[Ireland]], the [[United Kingdom]] and [[Australia]], ring sizes are specified using an alphabetical scale with half sizes. Originally in 1945, the divisions were based on the ring inside diameter in steps of {{convert|1/64|in|mm}}.<ref>British Standard 1283:1945</ref> However, in 1987 [[BSI Group|BSI]] updated the standard to the metric system so that one alphabetical size division equals 1.25&nbsp;mm of circumferential length. For a baseline, ring size C has a circumference of 40&nbsp;mm.<ref>British Standard 6820:1987</ref>

==== India, Japan, China ====
In [[India]], [[Japan]] and [[China]], ring sizes are specified using a numerical scale with whole sizes that do not have a [[linear]] correlation with diameter or circumference.

==== Germany and Netherlands ====

[[Netherlands]], [[Germany]], and sometimes [[Argentina]] use a standard (referred to as the German System<ref>{{Cite web |last=Hahnefeld |first=Bjoern |date=February 19, 2021 |title=ringgroesse |url=https://www.goldene-zeiten.info/fileadmin/uploads/ringgroesse-ermitteln.pdf |url-status=live |archive-url=https://web.archive.org/web/20210510050645/https://www.goldene-zeiten.info/fileadmin/uploads/ringgroesse-ermitteln.pdf |archive-date=May 10, 2021 |access-date=February 12, 2023 |website=Goldene Zeiten Juweliere}}</ref><ref name="auto"/><ref name="auto1"/>) where ring sizes are defined by the diameter of the ring, measured in mm.<ref>{{Cite web |title=Determine ring size |url=https://lepaul.amsterdam/pages/determine-ring-size |access-date=2024-04-19 |website=Le.Paul Jewelgarden |language=en}}</ref><ref>{{Cite web |title=How to measure your ring size |url=https://www.taj.nl/en/service/ringmaat-meten/?source=facebook |access-date=2024-04-19 |website=Taj Amsterdam |language=en}}</ref> This system may also be used at times in Russia. <ref name="auto"/>

==== Italy, Spain, Switzerland ====
In [[Italy]], [[Spain]], and [[Switzerland]], ring sizes are specified as the circumference minus 40&nbsp;mm: for example, size 10 in this system is equivalent to ISO 8653:2016 size 50.<ref>{{Cite web|url=https://meinrubin.de/ringweite-messen/|title=Ring size measurement|date=21 November 2022|language=de|author=Juwelier Limburg}}</ref> This may also be referred to as the Swiss Ring Size System. <ref name="auto1"/>

==== Russia ====
In [[Russia]], ring sizes are equal to the inner diameter rounded to whole and half numbers, sometimes to quarters, for example diameter 16.92&nbsp;mm is equal to size 17, 16.1&nbsp;mm is equal to size 16.

=== Equivalency table ===
{| class="wikitable sortable"
|+ Ring dimensions in various ring size measurement systems
|-
! colspan="2" | Inside [[diameter]]
! colspan="2" | Inside [[circumference]]
! colspan="5" | Sizes
|-
!(in)
!(mm)
!(in)
!(mm)<br> [[International Organization for Standardization|ISO]] <br/>([[Continental Europe|Continental]]<br/>[[Continental Europe|Europe]])
![[United States]],<br>[[Canada]] and<br>[[Mexico]]
![[United Kingdom]],<br>[[Ireland]],<br>[[Australia]],<br>[[South Africa]] and<br>[[New Zealand]]
![[East Asia]] ([[China]], <br>[[Japan]], <br>[[South Korea]]), <br>[[South America]]
![[India]]
![[Italy]], <br>[[Spain]], <br>[[Netherlands]], <br>[[Switzerland]]
|-
|0.458||{{convert|0.458|in|2|disp=number}}||{{Rnd|0.458*pi|2}}||{{convert|{{#expr: 0.458*pi}}|in|1|disp=number}}||0 ||  ||  ||  ||
|-
|0.466||{{convert|0.466|in|2|disp=number}}||{{Rnd|0.466*pi|2}}||{{convert|{{#expr: 0.466*pi}}|in|1|disp=number}}||{{frac|1|4|}} ||  ||  ||  ||
|-
|0.474||{{convert|0.474|in|2|disp=number}}||{{Rnd|0.474*pi|2}}||{{convert|{{#expr: 0.474*pi}}|in|1|disp=number}}||{{frac|1|2}} ||A ||  ||  ||
|-
|0.482||{{convert|0.482|in|2|disp=number}}||{{Rnd|0.482*pi|2}}||{{convert|{{#expr: 0.482*pi}}|in|1|disp=number}}||{{frac|3|4}} ||{{frac|A|1|2}}||  ||  ||
|-
|0.49 ||{{convert|0.49|in|2|disp=number}}||{{Rnd|0.49 *pi|2}}||{{convert|{{#expr: 0.49*pi}}|in|1|disp=number}}||1 ||B ||1 ||  ||
|-
|0.498||{{convert|0.498|in|2|disp=number}}||{{Rnd|0.498*pi|2}}||{{convert|{{#expr: 0.498*pi}}|in|1|disp=number}}||{{frac|1|1|4}}||{{frac|B|1|2}}||  ||  ||
|-
|0.506||{{convert|0.506|in|2|disp=number}}||{{Rnd|0.506*pi|2}}||{{convert|{{#expr: 0.506*pi}}|in|1|disp=number}}||{{frac|1|1|2}}||C ||  ||  ||{{#expr: {{convert|{{#expr: 0.506*pi}}|in|1|disp=number}}-40}}
|-
|0.514||{{convert|0.514|in|2|disp=number}}||{{Rnd|0.514*pi|2}}||{{convert|{{#expr: 0.514*pi}}|in|1|disp=number}}||{{frac|1|3|4}}||{{frac|C|1|2}}||  ||1 ||{{#expr: {{convert|{{#expr: 0.514*pi}}|in|1|disp=number}}-40}}
|-
|0.522||{{convert|0.522|in|2|disp=number}}||{{Rnd|0.522*pi|2}}||{{convert|{{#expr: 0.522*pi}}|in|1|disp=number}}||2 ||D ||2 ||2 ||{{#expr: {{convert|{{#expr: 0.522*pi}}|in|1|disp=number}}-40}}
|-
|0.53 ||{{convert|0.53|in|2|disp=number}}||{{Rnd|0.53 *pi|2}}||{{convert|{{#expr: 0.53*pi}}|in|1|disp=number}}||{{frac|2|1|4}}||{{frac|D|1|2}}||  ||  ||{{#expr: {{convert|{{#expr: 0.53*pi}}|in|1|disp=number}}-40}}
|-
|0.538||{{convert|0.538|in|2|disp=number}}||{{Rnd|0.538*pi|2}}||{{convert|{{#expr: 0.538*pi}}|in|1|disp=number}}||{{frac|2|1|2}}||E ||3 ||3 ||{{#expr: {{convert|{{#expr: 0.538*pi}}|in|1|disp=number}}-40}}
|-
|0.546||{{convert|0.546|in|2|disp=number}}||{{Rnd|0.546*pi|2}}||{{convert|{{#expr: 0.546*pi}}|in|1|disp=number}}||{{frac|2|3|4}}||{{frac|E|1|2}}||  ||4 ||{{#expr: {{convert|{{#expr: 0.546*pi}}|in|1|disp=number}}-40}}
|-
|0.554||{{convert|0.554|in|2|disp=number}}||{{Rnd|0.554*pi|2}}||{{convert|{{#expr: 0.554*pi}}|in|1|disp=number}}||3 ||F ||4 ||  ||{{#expr: {{convert|{{#expr: 0.554*pi}}|in|1|disp=number}}-40}}
|-
|0.562||{{convert|0.562|in|2|disp=number}}||{{Rnd|0.562*pi|2}}||{{convert|{{#expr: 0.562*pi}}|in|1|disp=number}}||{{frac|3|1|4}}||{{frac|F|1|2}}||5 ||5 ||{{#expr: {{convert|{{#expr: 0.562*pi}}|in|1|disp=number}}-40}}
|-
|0.57 ||{{convert|0.57|in|2|disp=number}}||{{Rnd|0.57*pi|2}}||{{convert|{{#expr: 0.57*pi}}|in|1|disp=number}}||{{frac|3|1|2}}||G ||  ||  ||{{#expr: {{convert|{{#expr: .57*pi}}|in|1|disp=number}}-40}}
|-
|0.578||{{convert|0.578|in|2|disp=number}}||{{Rnd|0.578*pi|2}}||{{convert|{{#expr: 0.578*pi}}|in|1|disp=number}}||{{frac|3|3|4}}||{{frac|G|1|2}}||6 ||6 ||{{#expr: {{convert|{{#expr: 0.578*pi}}|in|1|disp=number}}-40}}
|-
|0.586||{{convert|0.586|in|2|disp=number}}||{{Rnd|0.586*pi|2}}||{{convert|{{#expr: 0.586*pi}}|in|1|disp=number}}||4 ||H ||7 ||  ||{{#expr: {{convert|{{#expr: 0.586*pi}}|in|1|disp=number}}-40}}
|-
|0.594||{{convert|0.594|in|2|disp=number}}||{{Rnd|0.594*pi|2}}||{{convert|{{#expr: 0.594*pi}}|in|1|disp=number}}||{{frac|4|1|4}}||{{frac|H|1|2}}||  ||7 ||{{#expr: {{convert|{{#expr: 0.594*pi}}|in|1|disp=number}}-40}}
|-
|0.602||{{convert|0.602|in|2|disp=number}}||{{Rnd|0.602*pi|2}}||{{convert|{{#expr: 0.602*pi}}|in|1|disp=number}}||{{frac|4|1|2}}||I ||8 ||8 ||{{#expr: {{convert|{{#expr: 0.602*pi}}|in|1|disp=number}}-40}}
|-
|0.61 ||{{convert|0.61|in|2|disp=number}}||{{Rnd|0.61*pi|2}}||{{convert|{{#expr: 0.61*pi}}|in|1|disp=number}}||{{frac|4|3|4}}||J ||  ||9 ||{{#expr: {{convert|{{#expr: 0.61*pi}}|in|1|disp=number}}-40}}
|-
|0.618||{{convert|0.618|in|2|disp=number}}||{{Rnd|0.618*pi|2}}||{{convert|{{#expr: 0.618*pi}}|in|1|disp=number}}||5 ||{{frac|J|1|2}}||9 ||  ||{{#expr: {{convert|{{#expr: 0.618*pi}}|in|1|disp=number}}-40}}
|-
|0.626||{{convert|0.626|in|2|disp=number}}||{{Rnd|0.626*pi|2}}||{{convert|{{#expr: 0.626*pi}}|in|1|disp=number}}||{{frac|5|1|4}}||K ||  ||10||{{#expr: {{convert|{{#expr: 0.626*pi}}|in|1|disp=number}}-40}}
|-
|0.634||{{convert|0.634|in|2|disp=number}}||{{Rnd|0.634*pi|2}}||{{convert|{{#expr: 0.634*pi}}|in|1|disp=number}}||{{frac|5|1|2}}||{{frac|K|1|2}}||10||  ||{{#expr: {{convert|{{#expr: 0.634*pi}}|in|1|disp=number}}-40}}
|-
|0.642||{{convert|0.642|in|2|disp=number}}||{{Rnd|0.642*pi|2}}||{{convert|{{#expr: 0.642*pi}}|in|1|disp=number}}||{{frac|5|3|4}}||L ||  ||11||{{#expr: {{convert|{{#expr: 0.642*pi}}|in|1|disp=number}}-40}}
|-
|0.65 ||{{convert|0.65|in|2|disp=number}}||{{Rnd|0.65*pi|2}}||{{convert|{{#expr: 0.65*pi}}|in|1|disp=number}}||6 ||{{frac|L|1|2}}||11||12||{{#expr: {{convert|{{#expr: 0.65*pi}}|in|1|disp=number}}-40}}
|-
|0.658||{{convert|0.658|in|2|disp=number}}||{{Rnd|0.658*pi|2}}||{{convert|{{#expr: 0.658*pi}}|in|1|disp=number}}||{{frac|6|1|4}}||M ||12||  ||{{#expr: {{convert|{{#expr: 0.658*pi}}|in|1|disp=number}}-40}}
|-
|0.666||{{convert|0.666|in|2|disp=number}}||{{Rnd|0.666*pi|2}}||{{convert|{{#expr: 0.666*pi}}|in|1|disp=number}}||{{frac|6|1|2}}||{{frac|M|1|2}}||13||13||{{#expr: {{convert|{{#expr: 0.666*pi}}|in|1|disp=number}}-40}}
|-
|0.674||{{convert|0.674|in|2|disp=number}}||{{Rnd|0.674*pi|2}}||{{convert|{{#expr: 0.674*pi}}|in|1|disp=number}}||{{frac|6|3|4}}||N ||  ||  ||{{#expr: {{convert|{{#expr: 0.674*pi}}|in|1|disp=number}}-40}}
|-
|0.682||{{convert|0.682|in|2|disp=number}}||{{Rnd|0.682*pi|2}}||{{convert|{{#expr: 0.682*pi}}|in|1|disp=number}}||7 ||{{frac|N|1|2}}||14||14||{{#expr: {{convert|{{#expr: 0.682*pi}}|in|1|disp=number}}-40}}
|-
|0.69 ||{{convert|0.69|in|2|disp=number}}||{{Rnd|0.69*pi|2}}||{{convert|{{#expr: 0.69*pi}}|in|1|disp=number}}||{{frac|7|1|4}}||O ||  ||15||{{#expr: {{convert|{{#expr: 0.69*pi}}|in|1|disp=number}}-40}}
|-
|0.698||{{convert|0.698|in|2|disp=number}}||{{Rnd|0.698*pi|2}}||{{convert|{{#expr: 0.698*pi}}|in|1|disp=number}}||{{frac|7|1|2}}||{{frac|O|1|2}}||15||  ||{{#expr: {{convert|{{#expr: 0.698*pi}}|in|1|disp=number}}-40}}
|-
|0.706||{{convert|0.706|in|2|disp=number}}||{{Rnd|0.706*pi|2}}||{{convert|{{#expr: 0.706*pi}}|in|1|disp=number}}||{{frac|7|3|4}}||P ||  ||16||{{#expr: {{convert|{{#expr: 0.706*pi}}|in|1|disp=number}}-40}}
|-
|0.714||{{convert|0.714|in|2|disp=number}}||{{Rnd|0.714*pi|2}}||{{convert|{{#expr: 0.714*pi}}|in|1|disp=number}}||8 ||{{frac|P|1|2}}||16||17||{{#expr: {{convert|{{#expr: 0.714*pi}}|in|1|disp=number}}-40}}
|-
|0.722||{{convert|0.722|in|2|disp=number}}||{{Rnd|0.722*pi|2}}||{{convert|{{#expr: 0.722*pi}}|in|1|disp=number}}||{{frac|8|1|4}}||{{frac|P|3|4}}||  ||  ||{{#expr: {{convert|{{#expr: 0.722*pi}}|in|1|disp=number}}-40}}
|-
|0.73 ||{{convert|0.73|in|2|disp=number}}||{{Rnd|0.73*pi|2}}||{{convert|{{#expr: 0.73*pi}}|in|1|disp=number}}||{{frac|8|1|2}}||{{frac|Q|1|4}}||17||18||{{#expr: {{convert|{{#expr: 0.73*pi}}|in|1|disp=number}}-40}}
|-
|0.738||{{convert|0.738|in|2|disp=number}}||{{Rnd|0.738*pi|2}}||{{convert|{{#expr: 0.738*pi}}|in|1|disp=number}}||{{frac|8|3|4}}||R ||  ||19||{{#expr: {{convert|{{#expr: 0.738*pi}}|in|1|disp=number}}-40}}
|-
|0.746||{{convert|0.746|in|2|disp=number}}||{{Rnd|0.746*pi|2}}||{{convert|{{#expr: 0.746*pi}}|in|1|disp=number}}||9 ||{{frac|R|1|2}}||18||  ||{{#expr: {{convert|{{#expr: 0.746*pi}}|in|1|disp=number}}-40}}
|-
|0.754||{{convert|0.754|in|2|disp=number}}||{{Rnd|0.754*pi|2}}||{{convert|{{#expr: 0.754*pi}}|in|1|disp=number}}||{{frac|9|1|4}}||S ||  ||20||{{#expr: {{convert|{{#expr: 0.754*pi}}|in|1|disp=number}}-40}}
|-
|0.762||{{convert|0.762|in|2|disp=number}}||{{Rnd|0.762*pi|2}}||{{convert|{{#expr: 0.762*pi}}|in|1|disp=number}}||{{frac|9|1|2}}||{{frac|S|1|2}}||19||21||{{#expr: {{convert|{{#expr: 0.762*pi}}|in|1|disp=number}}-40}}
|-
|0.77 ||{{convert|0.77|in|2|disp=number}}||{{Rnd|0.77*pi|2}}||{{convert|{{#expr: 0.77*pi}}|in|1|disp=number}}||{{frac|9|3|4}}||T ||  ||  ||{{#expr: {{convert|{{#expr: 0.77*pi}}|in|1|disp=number}}-40}}
|-
|0.778||{{convert|0.778|in|2|disp=number}}||{{Rnd|0.778*pi|2}}||{{convert|{{#expr: 0.778*pi}}|in|1|disp=number}}||10||{{frac|T|1|2}}||20||22||{{#expr: {{convert|{{#expr: 0.778*pi}}|in|1|disp=number}}-40}}
|-
|0.786||{{convert|0.786|in|2|disp=number}}||{{Rnd|0.786*pi|2}}||{{convert|{{#expr: 0.786*pi}}|in|1|disp=number}}||{{frac|10|1|4}}||U ||21||23||{{#expr: {{convert|{{#expr: 0.786*pi}}|in|1|disp=number}}-40}}
|-
|0.794||{{convert|0.794|in|2|disp=number}}||{{Rnd|0.794*pi|2}}||{{convert|{{#expr: 0.794*pi}}|in|1|disp=number}}||{{frac|10|1|2}}||{{frac|U|1|2}}||22||  ||{{#expr: {{convert|{{#expr: 0.794*pi}}|in|1|disp=number}}-40}}
|-
|0.802||{{convert|0.802|in|2|disp=number}}||{{Rnd|0.802*pi|2}}||{{convert|{{#expr: 0.802*pi}}|in|1|disp=number}}||{{frac|10|3|4}}||V ||  ||24||{{#expr: {{convert|{{#expr: 0.802*pi}}|in|1|disp=number}}-40}}
|-
|0.81 ||{{convert|0.81|in|2|disp=number}} ||{{Rnd|0.81*pi|2}} ||{{convert|{{#expr: 0.81*pi}}|in|1|disp=number}} ||11 ||{{frac|V|1|2}} ||23 ||25 ||{{#expr: {{convert|{{#expr: 0.81*pi}}|in|1|disp=number}}-40}}
|-
|0.818||{{convert|0.818|in|2|disp=number}}||{{Rnd|0.818*pi|2}}||{{convert|{{#expr: 0.818*pi}}|in|1|disp=number}}||{{frac|11|1|4}}||W ||  ||  ||{{#expr: {{convert|{{#expr: 0.818*pi}}|in|1|disp=number}}-40}}
|-
|0.826||{{convert|0.826|in|2|disp=number}}||{{Rnd|0.826*pi|2}}||{{convert|{{#expr: 0.826*pi}}|in|1|disp=number}}||{{frac|11|1|2}}||{{frac|W|1|2}}||24||26||{{#expr: {{convert|{{#expr: 0.826*pi}}|in|1|disp=number}}-40}}
|-
|0.834||{{convert|0.834|in|2|disp=number}}||{{Rnd|0.834*pi|2}}||{{convert|{{#expr: 0.834*pi}}|in|1|disp=number}}||{{frac|11|3|4}}||X ||  ||  ||{{#expr: {{convert|{{#expr: 0.834*pi}}|in|1|disp=number}}-40}}
|-
|0.842||{{convert|0.842|in|2|disp=number}}||{{Rnd|0.842*pi|2}}||{{convert|{{#expr: 0.842*pi}}|in|1|disp=number}}||12 ||{{frac|X|1|2}}||25||27||{{#expr: {{convert|{{#expr: 0.842*pi}}|in|1|disp=number}}-40}}
|-
|0.85 ||{{convert|0.85|in|2|disp=number}}||{{Rnd|0.85*pi|2}}||{{convert|{{#expr: 0.85*pi}}|in|1|disp=number}}||{{frac|12|1|4}}||Y ||  ||28||{{#expr: {{convert|{{#expr: 0.85*pi}}|in|1|disp=number}}-40}}
|-
|0.858||{{convert|0.858|in|2|disp=number}}||{{Rnd|0.858*pi|2}}||{{convert|{{#expr: 0.858*pi}}|in|1|disp=number}}||{{frac|12|1|2}}||{{frac|Y|1|2}} ||26||  ||{{#expr: {{convert|{{#expr: 0.858*pi}}|in|1|disp=number}}-40}}
|-
|0.866||{{convert|0.866|in|2|disp=number}}||{{Rnd|0.866*pi|2}}||{{convert|{{#expr: 0.866*pi}}|in|1|disp=number}}||{{frac|12|3|4}}||Z|| ||29||{{#expr: {{convert|{{#expr: 0.866*pi}}|in|1|disp=number}}-40}}
|-
|0.874||{{convert|0.874|in|2|disp=number}}||{{Rnd|0.874*pi|2}}||{{convert|{{#expr: 0.874*pi}}|in|1|disp=number}}||13 ||  {{frac|Z|1|2}}||27||30||{{#expr: {{convert|{{#expr: 0.874*pi}}|in|1|disp=number}}-40}}
|-
|0.882||{{convert|0.882|in|2|disp=number}}||{{Rnd|0.882*pi|2}}||{{convert|{{#expr: 0.882*pi}}|in|1|disp=number}}||{{frac|13|1|4}}||Z1||  ||  ||{{#expr: {{convert|{{#expr: 0.882*pi}}|in|1|disp=number}}-40}}
|-
|0.89 ||{{convert|0.89|in|2|disp=number}}||{{Rnd|0.89*pi|2}}||{{convert|{{#expr: 0.89*pi}}|in|1|disp=number}}||{{frac|13|1|2}}||  ||  ||31||{{#expr: {{convert|{{#expr: 0.89*pi}}|in|1|disp=number}}-40}}
|-
|0.898||{{convert|0.898|in|2|disp=number}}||{{Rnd|0.898*pi|2}}||{{convert|{{#expr: 0.898*pi}}|in|1|disp=number}}||{{frac|13|3|4}}||Z2||  ||32||{{#expr: {{convert|{{#expr: 0.898*pi}}|in|1|disp=number}}-40}}
|-
|0.906||{{convert|0.906|in|2|disp=number}}||{{Rnd|0.906*pi|2}}||{{convert|{{#expr: 0.906*pi}}|in|1|disp=number}}||14 ||Z3||  ||  ||{{#expr: {{convert|{{#expr: 0.906*pi}}|in|1|disp=number}}-40}}
|-
|0.914||{{convert|0.914|in|2|disp=number}}||{{Rnd|0.914*pi|2}}||{{convert|{{#expr: 0.914*pi}}|in|1|disp=number}}||{{frac|14|1|4}}||  ||  ||33||{{#expr: {{convert|{{#expr: 0.914*pi}}|in|1|disp=number}}-40}}
|-
|0.922||{{convert|0.922|in|2|disp=number}}||{{Rnd|0.922*pi|2}}||{{convert|{{#expr: 0.922*pi}}|in|1|disp=number}}||{{frac|14|1|2}}||Z4||  ||  ||{{#expr: {{convert|{{#expr: 0.922*pi}}|in|1|disp=number}}-40}}
|-
|0.93 ||{{convert|0.93|in|2|disp=number}}||{{Rnd|0.93*pi|2}}||{{convert|{{#expr: 0.93*pi}}|in|1|disp=number}}||{{frac|14|3|4}}||  ||  ||34||{{#expr: {{convert|{{#expr: 0.93*pi}}|in|1|disp=number}}-40}}
|-
|0.938||{{convert|0.938|in|2|disp=number}}||{{Rnd|0.938*pi|2}}||{{convert|{{#expr: 0.938*pi}}|in|1|disp=number}}||15 ||  ||  ||35||{{#expr: {{convert|{{#expr: 0.938*pi}}|in|1|disp=number}}-40}}
|-
|0.946||{{convert|0.946|in|2|disp=number}}||{{Rnd|0.946*pi|2}}||{{convert|{{#expr: 0.946*pi}}|in|1|disp=number}}||{{frac|15|1|4}} ||  ||  ||  ||{{#expr: {{convert|{{#expr: 0.946*pi}}|in|1|disp=number}}-40}}
|-
|0.954||{{convert|0.954|in|2|disp=number}}||{{Rnd|0.954*pi|2}}||{{convert|{{#expr: 0.954*pi}}|in|1|disp=number}}||{{frac|15|1|2}}||  ||  ||36||{{#expr: {{convert|{{#expr: 0.954*pi}}|in|1|disp=number}}-40}}
|-
|0.962||{{convert|0.962|in|2|disp=number}}||{{Rnd|0.962*pi|2}}||{{convert|{{#expr: 0.962*pi}}|in|1|disp=number}}||{{frac|15|3|4}}||  ||  ||  ||{{#expr: {{convert|{{#expr: 0.962*pi}}|in|1|disp=number}}-40}}
|-
|0.97 ||{{convert|0.97|in|2|disp=number}}||{{Rnd|0.97*pi|2}}||{{convert|{{#expr: 0.97*pi}}|in|1|disp=number}}||16 ||  ||  ||37||{{#expr: {{convert|{{#expr: 0.97*pi}}|in|1|disp=number}}-40}}
|}

== Resizing ==
Most rings can be resized; the method of doing so depends on the complexity of the ring and its material. Rings of soft material may be enlarged using mechanical stretching. For example, the ring may be enlarged using a rolling mill, a steel ring mandrel, or a Schwann Ring Stretcher.<ref>https://www.ganoksin.com/article/different-methods-how-to-
resize-rings/ {{Bare URL inline|date=August 2024}}</ref> 

=== Adding Material ===
In some cases, the ring may need to be cut open and material either added or removed before fusing the ring together again. The ring may be slightly heated to reveal any solder line so the jeweler can open the ring on the same seam so as to minimize the total number of solder joins on the ring.<ref>{{cite news | url=https://www.ganoksin.com/article/different-methods-how-to-resize-rings/ | title=Different Methods on How to Resize Rings - Ganoksin Community | newspaper=Ganoksin }}</ref>

=== Sizing beads ===
Small metal beads called ''sizing beads'' can be added to the inner circumference of a ring to:
* Decrease the effective inner diameter of a ring that is too big, to aid in holding the ring in place against the finger
* Counterbalance top-heavy rings
* Keep a ring from spinning for wearers whose knuckles are much larger than their finger base<ref>[https://serengetiwest.com/do-i-need-ring-sizing-beads/ Do I Need Ring Sizing Beads? | Serengeti West Fine Jewelers]</ref>

Sizing beads are typically made of the same metal as the rest of the ring since it is easier to solder two similar metals.

== References ==

{{reflist}}


[[Category:Rings (jewellery)]]
[[Category:Sizes in clothing]]