For each flag, I am going to be using two pieces of 10-inch long duct tape. Place one piece on top of the other, overlapping about 1/4".

Measure out about one yard or more of your string or yarn.  Make sure you leave some extra on the ends to be able to hang your banner. Cut with your scissors.  

Find the center of your duct tape strips, which should be 5-inches.  Place your string right at that mark.

Take your duct tape piece from the end, folding over onto itself, locking in the string. Fold up any excess at the bottom onto itself. Boom! Your basic square duct tape flag is now done :)

Repeat Steps 1-4 to create your banner. I used different colors. You can use whatever colors you like.  I am using my thumb as a measurement for spacing.  In general, you want your flags to be 1 1/2 to 2 inches apart.

Repeat these steps until you have as many squares as you like.  One for each letter or character in your banner.

There are many different ways to cut these flags into fun shapes. Just remember to fold over each flag completely in half, so you get an even cut. In this case, I cut at a gentle angle, creating a scalloped edge. (Tip: this is the time to trim any excess from your fold-overs)

For this flag, I cut at a sharp angle creating a triangular shape flag.

For this yellow flag I created the classic banner style.  Again fold your flag over, measuring up in the center as far as you want to go. Cut from the center to outside edge.

I wanted to create one flag that looks like a flower. For this one I created a small tiny scallop cut and then another scallop cut.  When you open it up it looks flower-like.

You can also make a sharper angled banner by cutting all the way to top, on an angle.

Now that your flags are all cut, it's time to create your name letters. To do this you need to create a classic duct tape sticker. Write your letters on a small piece of parchment paper. (Tip: wait for the letters to dry completely). Apply your tape over the drawn letter and cut out using your scissors.

After cutting out all of your letters, apply them to the centers of each flag.

All done! Now you have a stylish, durable, waterproof banner!