This WikiProject is responsible for the template system used to create flag icons, with or without associated wikilinks. This project is only concerned with the implementation of these templates.

• See Wikipedia:WikiProject Heraldry and vexillology for issues regarding the flag images themselves.
• See Wikipedia:Manual of Style (flags) for guidelines about flag icon usage.

Produces a small image of the named flag. The image has a link to the article about the country associated with the flag.

Example: {{flag icon|Japan}} →

Example: {{flag icon|JPN}} →

Produces a small image of the named flag, plus a wikilink to the associated article. The icon image does not have a link (unlike flag icon) so that screen readers do not render the name twice.

Example: {{flag|United Kingdom}} →  United Kingdom

Similar to flag, but the associated country name is unlinked. This template should be used in articles with WP:OVERLINK concerns (e.g. when the same flag is used many times in a single table).

Example: {{flagu|United States}} →  United States

Similar to flag, but always uses the preferred display text for the wikilinked article. Useful when the input parameter can be a country code, or is a long-form country name because it links to a different article, such as for a historical country.

Examples:	{{flag country|Kingdom of Italy}} →  Italy
	{{flag country|BRA}} →  Brazil

Compare with flag, which always uses the first parameter as display name (unless when overridden with name):

• {{flag|Kingdom of Italy}} →  Kingdom of Italy
• {{flag|BRA}} →  BRA

Displays a flag of the named parameter in "icon" size, currently 23×15 pixels plus a one pixel border. This template is very similar to Template:Flag icon, except the image is not linked to an article, i.e. it is "purely decorative" per World Wide Web Consortium (W3C) Web Content Accessibility Guidelines (WCAG). This template can be used when the article text immediately adjacent to the icon provides the associated link for the flag.

Comparison example

• {{flag icon|United Nations}} →
• {{flag decoration|United Nations}} →

Usage examples

• {{flag decoration|US}} [[List of presidents of the United States]] → List of presidents of the United States
• {{flag decoration|France}} [[French First Republic]] → French First Republic

Many countries also have individual flag templates, named using standard three letter country codes so as to offer "shortcut" alternatives to the standard templates. This is a mixed blessing; some country codes (like "USA") are widely known and the corresponding shortcut templates (i.e. {{USA}}) offer convenience, but some country codes are relatively obscure, so wiki markup would likely be clearer if the country names were spelled out in full. Also, the shortcut templates do not offer the ability to use historical flag variants (described below), and are therefore less flexible.

Example: {{BEL}} →  Belgium (equivalent to {{flag|Belgium}})

See Wikipedia:Inline templates linking country articles for a complete list.

Besides the ones mentioned above, many other flag templates exist. This (probably incomplete) list excludes the military (see #Military flag templates) and sports templates (see #National sport team flag templates). See each template's documentation for more details.

Template	Description	Example
{{flag}}	Unlinked icon with country link	{{flag|Monaco}} →  Monaco
{{flagbig}}	Large flag icon; name and icon separated by line break	{{flagbig|Monaco}} → Monaco
{{flagc}}	Icon links to file description page (for attribution)	{{flagc|Monaco}} →  Monaco
{{flag country}}	Displays default country name instead of first parameter	{{flag country|MON}} →  Monaco
{{flag decoration}}	Unlinked flag icon only	{{flag decoration|Monaco}} →
{{flag icon}}	Icon only, linked to country page	{{flag icon|Monaco}} →
{{flagg}}	The most general flag template; many different output formats are possible depending on first parameter	{{flagg|isb|Monaco}} →  Flag of Monaco
{{flag link}}	Changes the link to one with text after the country name	{{flag link|Monaco|in the Eurovision Song Contest}} →  Monaco
{{flag+link}}	Changes the link to one with text before the country name, with existence check	{{flag+link|History of|Monaco}} →  Monaco
{{flaglist}}	Aligns country names correctly in vertical lists	{{flaglist|Monaco}} →  Monaco
{{flagof}}	Links to the article on the country's flag	{{flagof|Monaco}} →  Monaco
{{flagright}}	Icon after name	{{flagright|Monaco}} → Monaco
{{flagu}}	Unlinked country name	{{flagu|Monaco}} →  Monaco
{{getalias}} {{getalias2}} Module:CountryData	Extracts one or more data field values from a template	{{getalias|Monaco|flag}} → Flag of Monaco.svg

The following templates do not technically use the flag template system, but are used similarly:

Template	Description	Example
{{flagicon image}}	Formats a flag with specified filename similarly to {{flag decoration}} (for use if no data template exists).	{{flagicon image|Lozenge flag of Monaco.svg}} →
{{noflag}}	Returns the first parameter with whitespace to its left, if one entry in a vertical list doesn't/shouldn't have an icon	{{noflag|[[Monaco]]}} →  Monaco

The first (positional) parameter for these templates specifies the country (or other entity) to be used for the flag image. These actually identify additional templates that individually store information specific to that country. For example, the image name and main article name used by {{flag|Norway}} (to produce  Norway) is stored in Template:Country data Norway. The complete set of these "country data" templates is found in Category:Country data templates.

Note that there are country data templates for many entities that are not considered countries, such as international organizations or sub-national entities. The use of "country" in these template names is only because the original implementation of the flag template system was built upon Template:Country – a better name might have been "flag data", but it is likely too late for that change now.

Some examples of non-country flag templates are:

• {{flag|United Nations}} →  United Nations
• {{flag|European Union}} →  European Union
• {{flag|Catalonia}} →  Catalonia
• {{flag|Bern}} →  Bern

Many country data templates also exist for historical nations, and these can be used to produce the historical flags with wikilinks to the appropriate articles. Some examples are:

• {{flag|Austria-Hungary}} →  Austria-Hungary
• {{flag|Nazi Germany}} →  Nazi Germany
• {{flag|Soviet Union}} →  Soviet Union
• {{flag|Yugoslavia}} →  Yugoslavia

For added convenience, many flags can be identified by an alias name, typically a three-letter country code. For example, instead of {{flag icon|France}}, you could simply use {{flag icon|FRA}} to produce .

Alias names are available for almost every nation listed in ISO 3166-1 alpha-3, the list of IOC country codes, and the list of FIFA country codes. For example, {{flag icon|DEU}} (ISO) and {{flag icon|GER}} (IOC and FIFA) both produce . A small handful of other well-known abbreviations are also available (such as UK, EU, and USSR).

Alias names are implemented as redirects in the template namespace. For example, Template:Country data VEN is a redirect to Template:Country data Venezuela. The complete set of these redirects is listed in Category:Country data redirects, and the available alias redirect(s) for a given country data template (if any) are also documented on that template's page.

When using country code aliases, template flag will display this value for the wikilink's display text. For example:

• {{flag|USA}} →  USA
• {{flag|UK}} →  UK
• {{flag|CHN}} →  CHN

Note that in each case, the target wikilink points to the correct article name (i.e. United States, United Kingdom, and People's Republic of China, respectively) but the display text matches the input parameter to template flag. This may be the desired effect, such as in column headings of a large table, but if the full name is wanted, then use Template:Flag country instead:

• {{flag country|USA}} →  United States
• {{flag country|UK}} →  United Kingdom
• {{flag country|CHN}} →  China

Alias names have a second purpose, which is to provide alternative display text for target wikilinks. For example, the main article linked by Template:Country data East Germany is East Germany, but Template:Country data German Democratic Republic is a redirect alias. Therefore, you can use {{flag|German Democratic Republic}} for  German Democratic Republic. Again, note that the target article name for the generated wikilink is still East Germany.

Many countries have had different flag variations at various periods in their history. The flag template system can accommodate this by storing multiple flag variants inside country data templates. A specific flag variant is selected by specifying an additional parameter to any of the standard flag templates. This parameter is usually given as the second positional parameter to the template, but may also be given as the variant named parameter.

Examples

• {{flag|Germany|empire}} →  Germany
• {{flag|Germany|variant=empire}} →  Germany
• {{flag country|Bangladesh|1971}} →  Bangladesh
• {{flag icon|Bangladesh|1971}} →
• {{flag country|CAN|1921}} →  Canada
• {{flag icon|CAN|1921}} →

The set of available flag variants (if any) for a specific country data template are documented on the country data template page itself. Each variant is identified by a short text label, such as empire or 1921 in the examples above. Usually, the label identifies the year in which the flag was introduced, but this is not a mandatory style convention.

The default size for all flag icons created by these templates is 23x15px, with a one pixel border. That is, the icon will be no more than 23 pixels wide, and no more than 15 pixels tall. These dimensions were carefully chosen to generate the best results when flag icons are used in a bulleted list with the default browser text size. Some countries (mostly those with square or near-square flags) have different default sizes.

In certain situations, it might be desirable to use a larger (or smaller) size, and this is enabled with the size named parameter, available with all standard templates.

Examples

• {{flag|MON|size=100px}} →  MON
• {{flag icon|BGD|size=40px}} →
• {{small|{{flag|Belgium|size=15px}}}} →  Belgium

The display text of the target wikilink is usually automatically generated, but can always be over-ridden with the name parameter.

Examples

• {{flag|South Korea|name=Korea}} →  Korea (this name is used in several sports)
• {{flag|ROC|name=China}} →  China (China from 1912 to 1949)

Displays the naval ensign of the named country (identified as the naval variant in the corresponding country data template) plus a wikilink to the main article for the country's navy. Note that the naval ensign for many countries is the same as the national flag. Also note that the WP:SHIPS and WP:MILHIST conventions are to use naval ensigns, not naval jacks when identifying ships with flag icons.

Examples

• {{navy|UK}} →  Royal Navy
• {{navy|US}} →  United States Navy

Displays the navy's flag of the named country (identified as the navy variant in the corresponding country data template) plus a wikilink to the main article for the country's navy. Note that this is the navy flag, which differs from the naval ensign, which for many countries is the same as the national flag. If the navy does not have a flag, the jack is used instead. Also note that the WP:SHIPS and WP:MILHIST conventions are to use naval ensigns, not navy flags when identifying ships with flag icons.

Examples

• {{naval|Mexico}} →  Mexican Navy
• {{naval|US}} →  United States Navy

Displays a country's coast guard flag (the coast guard variant), or alternatively their racing stripe, and a wikilink to the country's coast guard.

Examples

• {{coast guard|UK}} →  His Majesty's Coastguard
• {{coast guard|CAN}} →  Canadian Coast Guard
• {{coast guard|FRA}} →  French Maritime Gendarmerie

Displays a country's army or war flag (the army variant) and a wikilink to the country's army.

Examples

• {{army|UK}} →  British Army
• {{army|US}} →  United States Army
• {{army|BAN}} →  Bangladesh Army

Displays a country's air force flag (the air force variant) and a wikilink to the country's air force.

Examples

• {{air force|UK}} →  Royal Air Force
• {{air force|US}} →  United States Air Force

One of the most common instances of flag icon usage on Wikipedia is for national sport teams. Several sets of sport-specific templates have been developed to also use this flag template system and some have variant forms (see individual templates' documentation):

• Template:bandy for bandy
• Template:bb for baseball
• Template:bd for badminton
• Template:bk for basketball
• Template:cr for cricket
• Template:davis and Template:fed for tennis (Davis Cup and Fed Cup)
• Template:fb for association football (soccer)
• Template:fh for field hockey
• Template:hb for handball
• Template:ih for ice hockey
• Template:iih for inline hockey
• Template:kd for kabaddi
• Template:korf for korfball
• Template:nb for netball
• Template:rl for rugby league
• Template:ru for rugby union
• Template:ru7 for rugby sevens
• Template:sb for softball
• Template:speedway for motorcycle speedway
• Template:squ for squash
• Template:svb for sitting volleyball
• Template:vb for volleyball
• Template:wp for water polo

These templates have intentionally been given terse names because they tend to be used many, many times on individual pages for match results. They completely supersede a set of previously used national team-specific templates. For example, {{fb|ITA}} replaced {{ITAf}}, {{ru|NZL}} replaced {{NZLru}} {{cr|BGD}} replaced {{BCB}}, etc.

There are often several template variations available for a given sport:

• with a "w" suffix, links to women's national team articles instead
• with a "-rt" suffix, renders the flag icon to the right of the nation's name instead of to the left. This formatting style is often used in match results
• with a -big" suffix, renders the flag icon in larger size and the team name underneath the flag. This formatting style is often used in tables of tournament results.

For example, for football, the following templates are used:

Team	Standard	Right flag	Big flag
Men's national teams	{{fb}}	{{fb-rt}}	{{fb-big}}
Examples	Spain	Netherlands	Germany
Women's national teams	{{fbw}}	{{fbw-rt}}	{{fbw-big}}
Examples	Spain	Netherlands	Germany

Users that do not like flag icons can disable them with a preference setting. A CSS class is used within the internal formatting template, and the class setting can be changed from a user's personal CSS file (skin-specific, cross-skin, or global).

Flag icon image rendering is disabled by:

.flagicon { display: none; }

Three types of templates are used by the flag template system, each with a different function:

1. User-transcluded templates
2. Country data templates (internal)
3. Formatting templates (internal)

For example, {{flag|Spain}}, uses:

1. Template:Flag, to accept input parameters, such as the country name (mandatory) and the optional flag variant, size, and wikilink display name.
2. Template:Country data Spain, to supply the image name and article name
3. Template:Flag/core, to actually render the image icon and wikilink

This system architecture means that:

• all country-specific data is contained within individual country data templates, improving maintainability
• the formatting wikicode is centralized in a very small number of templates, ensuring consistency

There are three steps in each flag template invocation. In the previous example of {{flag|Spain}}, the templates expand as follows:

First, Template:Flag expands to invoke Template:Country data Spain, and ensure that all user-specified parameters are set. The first parameter to the country data template is actually the name of the formatting template. This is the mechanism by which the same country data template can be used with multiple different formatting templates. Therefore, the first step of expansion results in:

{{country data Spain | flag/core | variant = | size = | name = Spain}}

If the variant (or second positional parameter), the size, and/or name parameters were specified in the user invocation, these would be set to the desired value. For example, {{flag|Spain|1939|name=España}} would expand to:

{{country data Spain | flag/core | variant = 1939 | size = | name = España}}

Next, the country data template expands to invoke the formatting template, plus add all the country-specific parameters. Going back to the simpler example of {{flag|Spain}}, the second expansion results in:

{{flag/core | alias = Spain | flag alias = Flag of Spain.svg | name = Spain}}

Lastly, the formatting template is expanded to produce:

<span class="flagicon">[[File:Flag of Spain.svg|23x15px|border |alt=|link=]]&nbsp;</span>[[Spain]]

The structure of all country data templates follows a standard pattern, which is extended to include additional parameters only when necessary. The empty boilerplate for all country data templates is as follows:

{{ {{{1<noinclude>|country showdata</noinclude>}}}
| alias =
| flag alias =
| size = {{{size|}}}
| name = {{{name|}}}
}}

There are two essential values that must be specified:

1. The alias value identifies the name of the main article associated with the flag.
2. The flag alias value identifies the image name of the default flag.

The invocation of country showdata on the first line is used to automatically generate the template documentation, as described below. The size = {{{size|}}} and name = {{{name|}}} statements ensure that any user-specified size and/or name values are passed through from the outer template (flag, flag icon, etc.) to the inner formatting template. Omission of these lines from the country data template would cause the size and name functionality to be disabled.

Additional flag variants are specified by individual flag alias statements. The unique label for the variant is the suffix of the parameter name, as flag alias-label (don't forget the hyphen). For example, Template:Country data Mexico has several flag variants, one of which is specified by:

| flag alias-1934 = Flag of Mexico (1934-1968).png

Therefore, when {{flag|Mexico|1934}} is transcluded, Image:Flag of Mexico (1934-1968).png is rendered. The selection of the flag variant is coded in the formatting templates.

Country data templates with at least one flag variant (in addition to the default) must also have the following line:

| variant = {{{variant|}}}

Similar to the size and name parameters as described above, this statement is required to pass the variant value (e.g. 1934) from the outer flag template to the inner formatting template. Omission of this line will cause the flag variant selection to fail.

If some flags are non-standard in shape and a 1px border is undesirable (for example for Nepal), then the border for the main flag may be defeated by adding the parameter

|border =

To remove the border for certain variant flags only, use the pattern |border-variant=, replacing variant with the respective variant label. For example:

|border-1976 = 
|border-colonial =

Nothing should be added after the equal sign(s). See Template:Country data Poland for examples of this usage.

Due to the coding of the flag templates, disabling the border for the main flag also automatically disables it for all flag variants. If the main flag should not have a border but any of the variants should, the respective |border-variant= parameters must be explicitly set to "border" to re-enable the 1px border:

|border-1976 = border

The best results are obtained when the template name matches the article wikilink (as specified by the alias value). For example, Template:Country data Russia contains alias = Russia, which results in a target wikilink to Russia.

However, there are instances where the main article name contains a disambiguation string. For example, Template:Country data Georgia contains alias = Georgia (country). Therefore, {{flag|Georgia}} results in  Georgia. Note that the wikilink is Georgia (country), but the display string is "Georgia", as expected.

In these instances, an additional statement is needed to support Template:Flag country properly. The shortname alias parameter should be set to the desired text string, such as shortname alias = Georgia. In effect, the resultant wikilink will be generated as [[alias|shortname alias]], or [[Georgia (country)|Georgia]] in this specific example.

The templates {{flaglink}} and {{flag+link}} append and prepend text to the link target, respectively. For example, to link to the education system in a table comparing different countries' educational outcomes, use

{{flag+link|Education in|Finland}}

Which results in  Finland.

For link targets that do not start or end with the country name, use the {{flagdeco}} template (which returns an unlinked flag icon without text) followed by a standard wikilink:

{{flagdeco|Finland}} [[Example page|Finland]]

Which would look like this: Finland.

Any country data template that will be used with a national team template must include an additional "pass-through" parameter:

| altlink = {{{altlink|}}}

This parameter is used to form the suffix of the associated wikilink. For example, Template:cr appends "national cricket team" to the country name (alias value), and this process is enabled by the altlink parameter.

In most cases, the flag and display name for national teams corresponds to the same flag and display name normally used for the nation. However, in some instances these can be over-ridden by additional parameters within the country data template. The default wikilink can also be changed in cases where the common naming convention is not used.

Some examples:

• South Korea is referred to as "Korea Republic" by FIFA. Therefore, Template:Country data South Korea includes name alias-football so that {{fb|South Korea}} produces  South Korea
• In many sports, all-Ireland teams compete with athletes from both the Republic of Ireland and Northern Ireland, and often under unique flags for each sport. Template:Country data Ireland includes unique flags for several sports teams, such as flag alias-field hockey = Flag of Ireland hockey team.svg, so that {{fh|Ireland}} produces  Ireland
• The New Zealand netball team is described at the Silver Ferns article, so to avoid the redirect at New Zealand national netball team, Template:Country data New Zealand contains link alias-netball = Silver Ferns so that {{nb|New Zealand}} produces  New Zealand

In each of these examples, the over-ride parameter (name alias-football, flag alias-field hockey, or link alias-netball) is identified by a unique per-sport variable that is passed from the appropriate sport team template. For example, Template:fb includes altvar = football. Therefore, any country data template that utilizes one or more team sport over-ride parameters must also include:

| altvar = {{{altvar|}}}

Country data templates "self-document" themselves through Template:Country showdata. Recall that the first line of each country data template is an invocation to a formatting template, defaulting to country showdata if that parameter is missing:

For simple country data templates, nothing further needs to be done to document them. If any flag variants, redirect aliases, etc. are used with the template, they are documented by adding parameters specifically for use by country showdata. These extra parameters are enclosed in a <noinclude>....</noinclude> section as they should not be present for any other invocation of the country data template.

See Template:Country showdata/doc for more information about how to document country data templates.

Pages with many flag icons may come close to or exceed Wikipedia's post-expand include size limit. In these cases consider using modules or module-wrapper templates instead:[

• Module:Flagg is a Scribunto module that reads existing country data templates and can produce a wide variety of outputs to replicate most existing flag templates. It can be invoked directly or used via {{Flagg}} (although the latter doubles the post-expand include size). See the documentation at Template:Flagg/doc for usage.
• Module:Flag is a wrapper for Module:Flagg that provides shortcuts to replace several common flag templates:

Template			Module
Code	Output	PEIS	Code	Output	PEIS
{{flag|CHN}}	CHN	443b	{{#invoke:flag||CHN}}	CHN	128b
{{flag country|CHN}}	China	577b	{{#invoke:flag|country|CHN}}	China	128b
{{flag decoration|CHN}}/{{flag deco|CHN}}		452b	{{#invoke:flag|decoration|CHN}}/{{#invoke:flag|deco|CHN}}		107b
{{flag icon|CHN}}		548b	{{#invoke:flag|icon|CHN}}		117b
{{flag link|CHN|at the 2004 Summer Olympics}}	China	497b	{{#invoke:flag|link|CHN|at the 2004 Summer Olympics}}	China	198b
{{flag+link|History of|CHN}}	China	663b	{{#invoke:flag|+link|History of|CHN}}	China	139b
{{flag team|GBR}}	Great Britain (GBR)	804b	{{#invoke:flag|team|GBR}}	Great Britain (GBR)	193b
{{flag athlete|Andy Murray|GBR}}	Andy Murray (GBR)	617b	{{#invoke:flag|athlete|Andy Murray|GBR}}	Andy Murray (GBR)	210b
{{flag medalist|Andy Murray|GBR}}	Andy Murray  Great Britain	469b	{{#invoke:flag|medalist|Andy Murray|GBR}}	Andy Murray  Great Britain	129b
{{flag IOC|CAN|1924 Winter|1}}	Canada (1)	326b	{{#invoke:flag|IOC|CAN|1924 Winter|1}}	Canada (1)	163b
{{flag IOC 2|HKG|1954 Asian Games|1}}	Hong Kong (1)	368b	{{#invoke:flag|IOC 2|HKG|1954 Asian Games|1}}	Hong Kong (1)	184b
{{flag IOC athlete|Mark Spitz|USA|1972 Summer}}	Mark Spitz (USA)	346b	{{#invoke:flag|IOC athlete|Mark Spitz|USA|1972 Summer}}	Mark Spitz (USA)	178b
{{fb|CHN}}	China	560b	{{#invoke:flag|fb|CHN}}	China	151b
{{fb-rt|CHN}}	China	482b	{{#invoke:flag|fb-rt|CHN}}	China	151b
{{fbicon|CHN}}		444b	{{#invoke:flag|fbicon|CHN}}		163b
{{ru|CHN}}	China	646b	{{#invoke:flag|ru|CHN}}	China	210b

• {{Coat of arms}} for coats of arms in infoboxes and lists
• {{flag IOC}} for a similar template used exclusively for Olympic Games related articles, and uses a different internal mechanism than for these templates.
• {{Shipboxflag}} for display of flags in ship infoboxes
• Wikipedia:Manual of Style (flags), the guideline about use of such flag icons in articles
• List of Country Codes for flag icons

• {{WikiProject Flag Template}} – banner for talk pages of template and flag-related project pages

• /Archive1 – Archive of project when testing of flag template was completed. June 23, 2005
• Revision as of 8 January 2007 – description of the previous version of the flag template system
• Revision as of 3 November 2007 – before this page was completely rewritten