1.25". This design more frequently appears as a re-pin made from the original paper in the 1950s. Obtaining a true original w/filled metal back bearing St. Louis Button Co. imprint as this example does is difficult at best. A few tiny air marks seen in reflected light in the white field of Sherman's portrait that are mentioned only for strict accuracy. Otherwise light wear. Exc. A rare opportunity at an all original example of this striking design.