Things You'll Need
Instructions
Measure the height from just under your bust to just below your belly button; add 1 inch and call this measurement A. Measure the circumference of your torso around your rib cage; call this measurement B.
Cut two large rectangles out of your T-shirt fabric; each rectangle should measure A by B inches. You may need more than one T-shirt to do this, depending on the size.
Place the two pieces of fabric together with the right sides facing one another. Fold them in half lengthwise with the folded edge facing down.
Start at the top left corner and move in by 4 inches; use a pen to draw a long, shallow "U" shape from this point to its counterpart 4 inches in from the top right corner. Cut along this line with scissors, going through all layers of the T-shirt fabric.
Open up the fabric and lay it flat so it somewhat resembles an hourglass shape. Pin the fabric together in this position using straight pins around the edges.
Use your sewing machine to sew a straight seam 1/2 inch in from the edge. Leave a 4-inch hole open in the seam for turning (in other words, do not sew along 4 inches of one edge).
Turn the piece right side out. Fold in the edges of the fabric along the opening from step 6 and pin the opening closed. Sew a straight seam all along the outside edges of the fabric to secure it further.
Hold the piece so that one short edge is closest to your body. Use a grommet tool to punch grommets along this edge, every 2 inches across. If you do not have a grommet tool, simply use scissors to punch or cut small holes instead. The holes should be approximately 1 inch in from the edge nearest you and spaced 2 inches apart across this side.
Repeat step 8 on the other short end of the piece.
Wrap the piece around your waist with the holes in front. Use a length of ribbon or lace to tie through the holes, as if tying a shoe. Pull tightly to fasten.