2-1/8” with a vertical brass wire on reverse to slip over pocket edge rather than a pin. This is for Wallace’s 1948 Progressive Party candidacy and it pictures him with the profile of FDR to the side. Photo may show some dustiness on the celluloid but this has cleaned off. Celluloid has about 6 exceedingly tiny and not very deep 1/16” surface marks just showing in reflected light. Button still displays essentially Mint. See following variety.