2.75” oval. Text includes “World’s Heavyweight Championship/Clay Vs. Patterson Las Vegas, Nov. 22/’65/Press/Convention Center.” On the front lower left is just a hairline sliver of excess celluloid that did not fold under the metal back. We have left this as it was made although it would be a simple matter to slice it off and the front would then display Mint without this slight edge which now shows. A very limited distribution button from a very famous fight. Rare. Also see Ali button with slogan in opposition to the Vietnam war #585.