This First Day Issue (FDI) cancellation stamp & envelope debuted at the 2007 San Diego Comic Con. It is autographed by Joe Sinnott, the inker of the image that appears on the stamp. The FDI measures approximately 3 3/4 by 6 3/4 inches, is in nm/mint condition and will be shipped with the utmost care. Please note- the signature is real. It is the actual, hand-signed signature of Sinnott. It is not a pre-printed image on the envelope.