1-3/8" diameter with silver luster tin rim holding two clear glass covers. The dexterity side has 1.25" hairline break in the glass but all is still fully sealed. Embossed thin card stock interior has eight tiny black balls to maneuver into eight tiny recesses on the big letter "E" at the center of a diamond design with text: Eaton's  Santa Claus In Toyland. The opposite side glass and image are NM. Paper under glass has bw screened photo with color added to give Santa a deep red hat and coat, deep green pants and a yellow giant toy sack. Santa's dog poses next to Santa's black boot. We've seen four different Eaton Santa buttons but only this one dexterity toy. Exc., w/one small crack. First seen. Rare.