8.5x11" in same format as items #2128-29 although this is a mid-1950s version that came as a special insert with boxed Superman costumes produced by Funtime Playwear. There are 3 notable differences. The coloring is noticeably different, the image of Superman is a more modern depiction than the classic early one used on the other certificates. This has facsimile signature of Superman rather than Clark Kent. Has inked recipient information on designated lines. Light aging, scattered trace of wear from handling. Appearance remains clean, Fine. Rare variety.