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.
Some coins are marketed in standard bullion sizes, like half ounce silver, one ounce silver etc, and some of those are also denominated as $1, for which see respective lists. This coin, denominated as One Niue Dollar, is not in a standard ounce-based size and is made using a "smartminting" technique - meaning that it has features not generally found in circulation coins.
This coin is part of the Man's Best Friends series and features a Chihuahua dog.
The Mint says about it:
"Considered the smallest breed of dog in the world, Chihuahuas are comical, entertaining, and loyal little dogs, though possessing a quirky and eccentric personality. There’s a reason we call dogs man’s best friends. A dog is handing out pure love and loyalty, asking absolutely nothing in return. Where, there’s a dog, there’s consistency, love, and the beauty of life at its finest. Apart from being a remarkable collector’s item in a specially designed packaging, the coin will make a charming gift for all lovers of Chihuahuas!"
Decoration: digital printing.
Quality: Proof.
Boxed. Comes with Certificate of Authenticity. | 
Search for Niue: One Dollar Silver 2014 Chihuahua Dog on eBay 
