Duct tape - I got mine at home depot, but I heard joanns and hobby lobby have a good selection of the "cute" tape
2 d rings - I used 1 inch but 1 1/2 would work also
Measure the waist of person and add ten inches. Cut 2 strips at that length.
Cut or tear one of those strips in half length wise
place a skinny strip down the back of the fat strip in the middle. sticky sides together
fold over the edges so all sticky is gone.
place the last skinny strip over the folded edges.
slide d rings onto one end, fold over and secure with a small piece of tape
you can easily cut any excess off when you put it on the person.