2.5" with names superimposed over each photo. Clockwise are "Al Jardine" leaning on a ladder, Brian Wilson, Dennis Wilson, Mike Love, Carl Wilson. Reverse is covered metal back with bar pin and the pin has made just the tiniest bump on the shoulder of Jardine at the right. The only other example we've seen had the same tiny defect. All else is essentially Mint. Unmarked but made by L.A. Stamp Stat. & Co.