Niue, a sovereign state in free association with New Zealand, uses two official legal tender currencies. The New Zealand Dollar is the circulation currency for daily transactions, while the government also authorises legal tender coins in the Niue Dollar currency for collector's purposes.
A number of mints issue a large variety of commemorative, bullion and collector coins under the authority of Niue. These coins are dedicated to historical or general popular culture themes not related to Niue itself. Many of them are in standard bullion sizes - typically, one ounce of silver (abbreviated as 1 oz Ag, where "Ag" comes from the Latin word for silver, Argentum). Many of these feature movie characters. Some are also in innovative shapes, such as "Chibi".
Chibi (ちび or チビ) is a Japanese slang word describing something short (a thing, an animal or a person). The term is widely used to describe a specific style of caricature where characters are drawn in an exaggerated way: small and chubby, with stubby limbs and oversized heads. Coins of this type look like cartoon characters and have their corresponding shape; they are also very thick for their size.
This coin is part of a New Zealand Mint Chibi collection dedicated to Disney characters, and features Elsa from Frozen.
The mint says about it:
Coloured and shaped, the coin showcases the magical queen in her crystal blue dress as she lets go of her fears and embraces who she is. It’s sure to leave you shivering with glee! As legal tender, the Ian Rank Broadley effigy of Her Majesty Queen Elizabeth II is stamped on the obverse.
The high-quality box features Disney’s Frozen-themed imagery. Printed on the back is a Certificate of Authenticity and the unique serial number of the coin in the limited mintage of 2,000. | 
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