Cut the card stock in half, making two 8 ½ inches wide and 5 ½ inches long pieces. Measure in ½ inch from one of the 5 ½-inch-long edges, and draw a faint pencil line there. Place a thin layer of glue between the edge and the pencil line, then glue the two pieces together, creating one long sheet that’s 16 ½ inches wide and 5 ½ inches long.