1.25" with no maker name or backpaper as issued. Left side has 3/8" long area where cello did not fold under the collet and a small piece of cello is actually missing from the side edge along with some small brown staining which extends very slightly to the front left edge. Vast majority of the button's front remains clean and glossy. We believe this is the first we've seen this photo of Lindy. Morry Greener Collection.