Very striking 1.25". Back paper by American Art Works is covered in tan dots. Front of the button has small mark upper right in our photo which is now gone although on the side edge there is a 1/8" slice of celluloid missing. From the front only a virtual pinpoint is missing. Front surface has traces of slight surface wear in reflected light but button comes very close to still displaying Mint. We've had just about a half dozen of these in 5 decades.