Things You'll Need
Instructions
Measure the size of the comic to determine the size of the backing board -- which is usually slightly larger than the comic. Comic sizes are based on the era of production and are referred to as current, regular, Silver Age and Golden Age. For example, the standard size for a backing board for a Silver Age comic is 7 by 10 1/2 inches.
Use a ruler and pencil to mark out the size of the backing board onto the mount board. Cut along the lines you have made with a sharp craft knife, using a steel ruler to guide the blade.
Place the backing board behind the comic or inside it, to help preserve the spine. Place the board and comic in a mylar sleeve.