2.25" with acetate sheet over a white paper which has the name "McCarthy" typewritten at center. Pictured are flowers that appear to be ink drawn but even if the black areas are printed, the pastel coloration is hand done. Front has small bump at right caused by bar pin on back. The back seems to be aluminum with the aluminum front wrapping over the edge of the aluminum reverse. Very unusual construction we've not seen before. No other text of any kind. The white paper was hand cut before being made into a button so on the side edges at places there is a bit of paper and at other places just the acetate covered metal. Likely unique. Julie Powell Collection.