Cut the duct tape cardboard core in half using a sturdy pair of scissors.
Trim the corners to create rounded edges.
Create your strap. Begin with a 10-inch piece of tape. Lay it sticky side up on your work surface. Fold about 1/4 inch onto itself, then fold the other side on top.
Cut the strap in half and secure each half to the inside of the cuff using pieces of tape. You will want the seam of the strap to be facing the inside of the cuff so it does not show while wearing the bracelet.
Cut some pieces of duct tape to 4 inches in length. Lay these pieces across the inside of the cuff.
Using an X-Acto knife, make several cuts in the tape to create a fringe. Pull the fringed strips over the top of the bracelet. For the rounded corners, place smaller strips at an angle and make one or more cuts the same as with the larger pieces, and pull the fringe over the top. Do this until the entire bracelet is covered.
Add more security to the strap by placing a thin strip of tape over the top of the cuff and then another small piece around the strap, overlapping the previous piece in the opposite direction.
For added embellishment, measure and cut a piece of tape about the length of your cuff and place it on a piece of parchment paper.
Cut any shape you want out of the duct tape on the parchment paper to create a duct tape sticker decoration for your bracelet. You can fold the paper in half while you cut to make a more symmetrical sticker. Place the sticker on your cuff.
Have the wearer put on the bracelet and measure the strap length. Trim any excess from the strap.
Cut a piece of sticky back velcro to the length of your strap. Leave the two pieces of velcro attached. Peel off the sticky backing of ONE side and leave the other one attached while you attach it to the strap.
Remove the other sticky backing and place the strap with the velcro inside the other strap so that the sticky backing attaches. Press firmly and then pull the two pieces of velcro apart.
Now you have your finished bracelet that you can wear and show off!