Space Pirate by Al Williamson
This fantastic sketch by Al Williamson is done on 6.5" x 10" cardstock. My scanner didn't do a good job of capturing the great coloring job, but you get the general idea. The piece is in great condition, especially considering its age.

Al drew several of these (all slightly different) in the late 60's, along with some similar Flash Gordon sketches, to sell to fans at the Phil Seuling conventions in New York. One of these sketches (not this one in particular) was used as the front cover to the Al Williamson sketchbook.