1.25" with superb color and outstanding design depicting the "Official Seal" of "Sgt. Preston Of The Yukon." Very bottom edge of button has narrow .75" long area where the white has just the faintest trace of tan tone to it. This line is hardly noticeable in most light angles and is mentioned only for full accuracy. The entire button displays beautifully with intense color, perfect centering and exceptionally high gloss. The little bit of surface wear there is shows only with magnification. Only a handful of these are known and our last example about 2 years ago realized close to $900. This opens lower because of the slight trace of rim stain but it displays extremely close to Mint.