Coinage shapes#Holed

The Cook Islands have a circulating 2 dollar triangular coin with rounded corners.[https://en.numista.com/catalogue/pieces4436.html 2 Dollars – Elizabeth II (3rd portrait) – Cook Islands]. Numista.

File:Netherlands Antilles - 50 Cent of 1989.jpg from the Netherlands Antilles.]]

Indo-Greek coins were often square. Aruba has a large circulating square 50 cents coin.[https://en.numista.com/catalogue/pieces6840.html 50 Cents – Beatrix / Willem-Alexander (magnetic) – Aruba]. Numista.

Many countries have struck square coins with rounded corners. Some of these, such as the Netherlands zinc 5 cent coin of World War II (1941–1943)[https://en.numista.com/catalogue/pieces1150.html 5 Cents – Wilhelmina I (German Occupation) – Netherlands – Numista]. En.numista.com. Retrieved on 2021-05-23. and the Bangladesh 5 poisha coin (1977–1994)[https://en.numista.com/catalogue/pieces1978.html 5 Poisha (FAO) – Bangladesh]. Numista. are oriented as a square, while others, such as the Netherlands 5 cents (1913–1940),[https://en.numista.com/catalogue/pieces3370.html 5 Cents – Wilhelmina – Netherlands – Numista]. En.numista.com. Retrieved on 2021-05-23. the Netherlands Antilles 50 cent, the Bangladesh 5 poisha (1973–1974)[https://en.numista.com/catalogue/pieces6765.html 5 Poisha – Bangladesh]. Numista. and the 1981 Jersey 1 pound coin,[https://en.numista.com/catalogue/pieces14682.html 1 Pound – Elizabeth II (Battle of Jersey) – Jersey]. Numista. are oriented as a diamond. Ceylon (the current Sri Lanka) issued its first square coin in 1909, followed by several others.[https://en.numista.com/catalogue/pieces12117.html 5 Cents – Edward VII – Ceylon]. Numista. India has had various circulating square coins as well, like denominated {{frac|1|2}} and 2 anna coins,[https://en.numista.com/catalogue/pieces1612.html {{citefrac|1|2}} Anna – George VI – India – British]. Numista. as well as 1 and 5 paisa coins.[https://en.numista.com/catalogue/pieces7179.html 1 Paisa – India]. Numista.

Siege money, such as Klippe coins or the siege money of Newark, was often in the shape of a lozenge (rhombus).

The Mutawakkilite Kingdom of Yemen introduced pentagonal {{frac|16}} and {{frac|8}} rial coins in 1948.[https://en.numista.com/catalogue/pieces19672.html {{citefrac|1|16}} Riyal – Ahmad – Mutawakkilite Kingdom]. Numista.[https://en.numista.com/catalogue/pieces19674.html {{citefrac|1|8}} Riyal – al-Nasir Ahmad bin Yahya – Mutawakkilite Kingdom]. Numista. In 2014 Transnistria was the next country to issue a circulating pentagonal 5 rubles hard plastic coin.[https://en.numista.com/catalogue/pieces64483.html 5 Rubles – Transnistria]. Numista.

The Belgian Congo had a hexagonal 2 franc coin,[https://en.numista.com/catalogue/pieces7011.html 2 Francs – Léopold III – Belgian Congo]. Numista. as did the Kingdom of Egypt (2 piastres, also known as 2 qirsh).[https://en.numista.com/catalogue/pieces8677.html 2 Qirsh – Farouk – Egypt]. Numista. India used to have 3 paise and 20 paise coins that were hexagonal with rounded corners.[https://en.numista.com/catalogue/pieces1847.html 3 Paise – India]. Numista.[https://en.numista.com/catalogue/pieces1635.html 20 Paise – India – Numista]. En.numista.com. Retrieved on 2021-05-23. The Burma (25 pyas) is scalloped hexagonal.[https://en.numista.com/catalogue/pieces5612.html 25 Pyas – Myanmar]. Numista.

The Madagascar 10 ariary coin is seven-sided.[https://en.numista.com/catalogue/pieces8462.html 10 Ariary (motto A) – Madagascar]. Numista. The British twenty pence and fifty pence coins are heptagonal Reuleaux polygons,[https://en.numista.com/catalogue/pieces865.html 20 Pence – Elizabeth II (2nd portrait) – United Kingdom – Numista]. En.numista.com. Retrieved on 2021-05-23.[https://en.numista.com/catalogue/pieces880.html 50 New Pence – Elizabeth II (2nd portrait) – United Kingdom – Numista]. En.numista.com. Retrieved on 2021-05-23. as is the United Arab Emirates 50 fils coin, the Barbados one dollar coin,[https://en.numista.com/catalogue/pieces924.html 1 Dollar – (large type) – Barbados]. Numista. and several coins from Botswana.[https://en.numista.com/catalogue/pieces5410.html 5 Thebe – Botswana]. Numista. Many countries in the Commonwealth of Nations have issued heptagonal coins. Reuleaux polygons have constant width, which means the currency detectors in coin-operated machines do not need an extra mechanism to detect shape.{{cite web |last1=Houston |first1=Kevin |authorlink1=Kevin Houston (mathematician) |title=Curves of constant width – The 50p story |url=http://www.kevinhouston.net/blog/2011/07/curves-of-constant-width-the-50p-story/ |accessdate=1 July 2018 |date=8 July 2011}}

The Chile 1 peso and 5 pesos coins issued from 1992 to 2015 are eight-sided.[https://en.numista.com/catalogue/pieces1866.html 1 Peso – Chile]. Numista.[https://en.numista.com/catalogue/pieces2843.html 5 Pesos – Chile]. Numista. So was the old circulating Malta 25 cent coin commemorating Malta's first anniversary of the republic[https://en.numista.com/catalogue/pieces4170.html 25 Cents (1st Anniversary of Republic) – Malta – Numista]. En.numista.com. Retrieved on 2021-05-23. and some California gold coins. Some other countries that have issued circulating octagonal coins are the Lebanon[https://en.numista.com/catalogue/pieces5222.html 50 Līrah / Pounds (stainless steel) – Lebanon]. Numista. and Sierra Leone.[https://en.numista.com/catalogue/pieces10761.html 50 Leones – Sierra Leone]. Numista.

File:Egypt 1933, 2.5 Milliemes, copper-nickel, octagonal.jpg.]]

In 1972 the first country to issue a circulating nine-sided coin was Thailand with a 1972 regular 5 baht coin,[https://en.numista.com/catalogue/pieces9431.html 5 Baht – Rama IX – Thailand]. Numista. followed by Kenya in 1973 with a special issue Kenyan shilling#Coins coin. The third and final circulating nonagonal coin issued in the 20th century and is the regular 1976 50 cent coin from Tuvalu.[https://en.numista.com/catalogue/pieces12142.html 1 Dollar – Elizabeth II (2nd portrait) – Tuvalu]. Numista. Currently, the Philippines issues nonagonal 5-peso coins from 2019 as an enhanced design of the round version to make it distinct from the other denominations.{{Cite news|last=Lopez|first=Melissa|date=December 17, 2019|title=LOOK: Here are the new ₱5, ₱20 coins|work=CNN Philippines|url=https://cnnphilippines.com/news/2019/12/17/New-5-20-peso-coins.html?fbclid=IwAR2ffIZrYdQm8M1SlJuSUXMFD63pKn1cF4_6GBHX-9uHfqjYod_1nP_m7Ow|access-date=September 17, 2020|archive-date=October 5, 2020|archive-url=https://web.archive.org/web/20201005105906/https://cnnphilippines.com/news/2019/12/17/New-5-20-peso-coins.html?fbclid=IwAR2ffIZrYdQm8M1SlJuSUXMFD63pKn1cF4_6GBHX-9uHfqjYod_1nP_m7Ow|url-status=dead}}

Hong Kong issued a ten-sided 5 dollar coin from 1976 to 1979,[https://en.numista.com/catalogue/pieces3992.html 5 Dollars – Elizabeth II (2nd portrait) – Hong Kong]. Numista. while the Philippines issued ten-sided two piso (peso) coins from 1983 to 1990.[https://en.numista.com/catalogue/pieces3750.html 2 Piso – Philippines]. Numista. Some other countries that have issued ten-sided circulation coins are Chile,[https://en.numista.com/catalogue/pieces2834.html 50 Pesos – Chile]. Numista. the Dominican Republic,[https://en.numista.com/catalogue/pieces20878.html 1 Peso (Montesinos, Enriquillo, Lemba) – Dominican Republic]. Numista. Jamaica[https://en.numista.com/catalogue/pieces7457.html 50 Cents (Wide legend) – Jamaica]. Numista. and Madagascar.[https://en.numista.com/catalogue/pieces10559.html 20 Ariary (motto A) – Madagascar]. Numista.

The old Indian 2-rupee coin was eleven-sided,[https://en.numista.com/catalogue/pieces5474.html 2 Rupees (National Integration; hendecagonal type) – India]. Numista. while the Canadian one dollar coin is an eleven-sided Reuleaux polygon.[https://en.numista.com/catalogue/pieces465.html 1 Dollar – Elizabeth II (2nd portrait) – Canada – Numista]. En.numista.com. Retrieved on 2021-05-23. Also Madagascar has issued some circulating eleven-sided coins.[https://en.numista.com/catalogue/pieces1856.html 50 Ariary (motto A) – Madagascar]. Numista.

File:1942 threepence reverse.jpg from 1937 to 1971.]]

Many countries have struck twelve-sided coins, mostly countries belonging to the Commonwealth of Nations. Several of these are threepence coins from the pre-decimal pound.[https://en.numista.com/catalogue/pieces12570.html 3 Pence – George VI – Fiji]. Numista.[https://en.numista.com/catalogue/pieces4936.html {{citefrac|1|4}} Shilling – Elizabeth II (1st portrait) – Jersey – Numista]. En.numista.com. Retrieved on 2021-05-23. Coins currently circulating include the British one pound coin,[https://en.numista.com/catalogue/pieces100658.html 1 Pound – Elizabeth II (5th portrait; Nations of the Crown) – United Kingdom – Numista]. En.numista.com. Retrieved on 2021-05-23. 50 cent coins from Australia,[https://en.numista.com/catalogue/pieces904.html 50 Cents – Elizabeth II (2nd Portrait – Dodecagonal type) – Australia]. Numista. Fiji[https://en.numista.com/catalogue/pieces4152.html 50 Cents – Elizabeth II (2nd portrait) – Fiji]. Numista. and the Solomon Islands,[https://en.numista.com/catalogue/pieces3487.html 50 Cents – Elizabeth II (3rd portrait; non-magnetic) – Solomon Islands]. Numista. the Tongan 50 seniti coin[https://en.numista.com/catalogue/pieces22098.html 50 Seniti – Taufa'ahau Tupou IV – Tonga]. Numista. and the circulating commemorative Croatian 25 kuna coins.[https://en.numista.com/catalogue/pieces11963.html 25 Kuna (Danube Region) – Croatia – Numista]. En.numista.com. Retrieved on 2021-05-23.

File:20 CZK.png from the Czech Republic is tridecagonal.]]

In 1993, the Czech Republic was the first country to issue a 13 sided 20 koruna coin.[https://en.numista.com/catalogue/pieces2148.html 20 Korun – Czech Republic]. Numista. In 2013, Tunisia followed with a 13-sided 200 millièmes coin.[https://en.numista.com/catalogue/pieces53900.html 200 Millièmes – Tunisia – Numista]. En.numista.com. Retrieved on 2021-05-23.

A 5 dirham commemorative coin from the UAE in 1981 had 15 sides, commemorating the 15th century of Hejira.[https://en.numista.com/catalogue/pieces12137.html 5 Dirhams – Zayed (15th Hijrah Century) – United Arab Emirates – Numista]. En.numista.com. Retrieved on 2021-05-23.

File:50 dirham coin, SPLAJ, Libya (17311897955).jpg from Libya has a scalloped edge with sixteen bumps.]] Many countries have coins with scalloped (wavy) edges. These usually have twelve bumps (e.g. the Vanuatu 100 vatu or the Hong Kong 20 cents), but can have other numbers such as eight (the Eswatini 10 cents or the Ang Bagong Lipunan Philippine five centavo coin) or sixteen (the Libya 50 dirhams).

Often a round coin will have a central hole. In some countries this was to allow them to be strung together,{{cite web |title=Why Do Some Ancient Coins Have Holes In Them? |url=https://www.coins-auctioned.com/learn/coin-articles/why-do-some-ancient-coins-have-holes-in-them |accessdate=3 July 2018}} while other reasons include difficulty of counterfeiting and ability for visually impaired people to distinguish them from other coins.{{cite news |last1=Gordenker |first1=Alice |title=5 yen and 50 yen coins |url=https://www.japantimes.co.jp/news/2006/06/20/reference/5-yen-and-50-yen-coins |accessdate=3 July 2018 |work=The Japan Times |date=20 June 2006}}

File:1884 ring nickel (obverse).jpg United States ring nickel with an octagonal hole.]]

Some coins give the impression that holes were used to save metal, though it may not be possible to prove with certainty that this was the reason for creating the holes. An example of such a coin with a fairly large hexagonal hole is a undated tin 1 cash coin, minted in the period 1550–1596, that circulated in the Banten Sultanate on Java and Sumatra (Indonesia).[https://en.numista.com/catalogue/pieces76366.html 1 Cash – Malay peninsula]. Numista. Also, several tin 1 pitis coins with exceptionally large round holes, of which some were made in octagonal coins, were used in Jambi Sultanate on Northern Sumatra (Indonesia).[https://en.numista.com/catalogue/pieces107489.html 1 Pitis – Malay peninsula]. Numista. Due to the soft metal tin used to make these thin old coins, they can easily be bent. In the years 1943–1947 India produced 1 pice coins for circulation with very large holes,[https://en.numista.com/catalogue/pieces1613.html 1 Pice – George VI – India – British]. Numista. continued by Pakistan producing 1 pice coins of equal shape in the years 1948–1952.[https://en.numista.com/catalogue/pieces14095.html 1 Pice – Pakistan]. Numista.

Chinese cash coins had a square hole, while many modern coins have a round hole. Examples include the Japan 5 yen coin and 50 yen coin, and the Denmark 1 krone coin.

Rectangles: In the Edo period Japan issued several circulating silver and gold rectangular coins,[https://en.numista.com/catalogue/pieces10811.html 1 Shu "Kaei Isshugin" – Japan]. Numista.[https://en.numista.com/catalogue/pieces16677.html 2 Shu – Tempo (Edo mint) – Japan]. Numista. as well as a copper clad lead issue with a hole.[https://en.numista.com/catalogue/pieces116959.html 100 Mon "Dōzanshihō Tōhyaku" – Kubota Domain]. Numista.

Near oval: Japan also issued various near oval coins in the Edo period.[https://en.numista.com/catalogue/pieces175770.html Chōgin "Genbun Chōgin" (6 stamps) – Japan]. Numista.[https://en.numista.com/catalogue/pieces11614.html 100 Mon "Tenpōtsūhō" – Japan]. Numista.[https://en.numista.com/catalogue/pieces22799.html 1 Ryō "Man'en Koban" – Japan]. Numista.

Half circle: for Barbados Spanish coins were cut in half, it is hard to detect originals though, many forgeries exist.[https://en.numista.com/catalogue/pieces117882.html 1 Bit – Barbados]. Numista.

Triangular: Bermuda has some special issue triangular coins from 1997 onward with curved edges.[https://en.numista.com/catalogue/pieces18298.html 1 Dollar – Elizabeth II (Wreck of the Sea Venture) – Bermuda]. Numista.

The Isle of Man has some triangular special issue coins where the triangle is not regular (the angles are not all 60 degrees).[https://web.archive.org/web/20200711043702/https://en.numista.com/catalogue/pieces93324.html 1 Crown – Elizabeth II Tutankhamun: Death Mask]. Numista.

Octagonal: The U.S. Panama–Pacific commemorative 50 dollar coins of 1915 is shaped like a true octagon.[https://en.numista.com/catalogue/pieces24935.html 50 Dollars (Panama–Pacific Exposition) – United States]. Numista.

Tetradecagonal: In 1976, Malaysia was the first country to issue 14-sided coins, the non-circulating 10 (silver) and 200 (gold) ringgit.[https://en.numista.com/catalogue/pieces17787.html 10 Ringgit – (3rd Malaysian Plan) – Malaysia]. Numista. Australia started to issue a series of non-circulating 14-sided 50 cents coins dedicated to the Chinese zodiac in 2012.[https://en.numista.com/catalogue/pieces42984.html 50 Cents – Elizabeth II (4th Portrait – Year of the Dragon) – Australia]. Numista.

Rectangular: Jersey[https://en.numista.com/catalogue/pieces198999.html 50 Pence – Elizabeth II (The Battle of Hastings 50 Pence Silver Coin-Bar) – Jersey]. Numista. and Fiji[https://en.numista.com/catalogue/pieces156499.html 1 Dollar (Berlin) – Fiji]. Numista. have issued non-circulating rectangular coins.

Oval: Fiji and Poland have issued some non-circulating oval coins.[https://en.numista.com/catalogue/pieces82769.html 10 Dollars – Elizabeth II (Apocalypse I Prophecy of Maya Calendar) – Fiji]. Numista.[https://en.numista.com/catalogue/pieces28822.html 10 Złotych (Grunwald) – Poland]. Numista.

Quarter circle: Poland has issued a 10 złotych coin in the shape of a quarter circle.[https://en.numista.com/catalogue/pieces51893.html 10 Złotych (Expo 2005) – Poland – Numista]. En.numista.com. Retrieved on 2021-05-23.

Spheres: Niue issued the first official (non-circulating) spherical coin with a face value of 7 New Zealand dollars.[https://en.numista.com/catalogue/pieces183881.html 7 Dollars – Elizabeth II (Seven New Wonders of The World) – Niue]. Numista. Several other countries followed soon with spherical coins, like Poland and Barbados. A 2008–2014 1 dollar sphere issue from Somalia is considered a fantasy coin, it was not officially issued by Somalia.[https://en.numista.com/catalogue/pieces41923.html 1 Dollar (Volume geometrical figures – Sphere) – Somalia]. Numista.

Yin Yang: Fiji has issued some Yin Yang shaped coins.[https://en.numista.com/catalogue/pieces107264.html 1 Dollar (Year of the Goat) – Fiji]. Numista.

Arc (section of a circle with a hole): China started to issue a series of arc-shaped coins in the year 2000.[https://en.numista.com/catalogue/pieces164381.html 10 Yuan (Year of the Dragon; Silver Bullion) – People's Republic of China]. Numista.

Heart: Several countries have issued non-circulating heart shaped coins, like China, Cook Islands and Poland.[https://en.numista.com/catalogue/pieces30366.html 10 Złotych (Great Orchestra of Christmas Charity) – Poland]. Numista.

Maps: Nauru has issued some non-circulating map shaped coins.[https://en.numista.com/catalogue/pieces54805.html 10 Dollars – Elizabeth II (German Mark) – Nauru]. Numista.[https://en.numista.com/catalogue/pieces54803.html 10 Dollars – Elizabeth II (Euro Coinage) – Nauru]. Numista. Australia also has issued some non-circulating map shaped coins (1 dollar coins in the shape of the map of Australia).[https://en.numista.com/catalogue/pieces46215.html 1 Dollar – Elizabeth II (4th Portrait – World Expo – Australia Map Coin) – Australia]. Numista.

Coca-Cola cap: Fiji has issued some non-circulating coins shaped like the cap of a Coca-Cola bottle.[https://en.numista.com/catalogue/pieces131407.html 1 Dollar (Coca-Cola) – Fiji]. Numista.

Cannabis leaf: Benin issued a non-circulating 100 CFA francs coin shaped like a cannabis leaf in 2011.[https://en.numista.com/catalogue/pieces24709.html 100 Francs CFA (Cannabis Sativa) – Benin]. Numista.

Masks: Fiji issued an Iron Man Mask and a Spider-Man Mask coin in 2019, both non-circulating.[https://en.numista.com/catalogue/pieces185902.html 5 Dollars (Ironman Mask) – Fiji]. Numista.[https://en.numista.com/catalogue/pieces185027.html 5 Dollars (Spiderman Mask) – Fiji]. Numista.

• Spanish flower

{{reflist|colwidth=30em}}

{{Commons category|Coins by shape}}

• [https://www.fleur-de-coin.com/articles/unusual-coins Unusual / odd coins around the world]

{{Coin collecting}}

Category:Geometric shapes

Category:Production of coins