This estate piece is a Sydney 2000 Olympics commemorative gold coin collection. They come in the display box with the certificate of authenticity as shown. 999 gold and proof quality coins. They measures about 25mm, so they are about the size of a US quarter, give or take. The item "The Sydney 2000 Olympic Gold Coin Series Collection Special Edition Set" is in sale since Saturday, June 24, 2017.This item is in the category "Coins & Paper Money\Coins\ World\Australia & Oceania\Australia\Commemorative". The seller is "estatepawnqueen" and is located in Charlestown, Indiana. This item can be shipped to United States, Canada.