Fold your 8.5"x11" piece of card stock in half and divide it into four equal pieces. Make small pencil marks if needed.
Cut the paper into strips, leaving the folded edge intact.
Using a piece of double-sided tape, attach the ribbon between the edges of the cardstock. Space the pieces evenly, making sure to leave enough ribbon on each side to hang.
Continue until full length of the banner desired is reached.
Working one piece at a time, coat the bottom half of each banner piece with a layer of Mod Podge.
Sprinkle on some confetti, press down, and shake off the excess.
Let your banner dry for an hour or so and you're ready to party!
Notes
One piece of 8.5" x 11" paper makes four banner pieces.