The Susan B. Anthony silver dollar coin has a diameter of 26.49 millimeters, or 1.043 inches. Golden dollar coins, such as the Native American and the Presidential dollar coins, have the same measurements as the silver dollar coin.
The United States $1 Coin Act of 1997 required that the Susan B. Anthony dollar and the new golden dollars be identical in size. In addition, this act mandates that the Susan B. Anthony dollar coin continues to circulate with the golden dollar and the dollar bill. The Government Accountability Office estimates that removing paper dollars from circulation would save the government about $531 million in the first 10 years and $4.4 billion over 30 years.