Here's what you will need:
- 2 XL t-shirts
- 2 different sizes of elastic (1/4''/1''); you will need to measure your waist to decide how much you will need. The best way to do this is to just wrap the elastic around your waist and cut where comfortable.
- Sewing machine and other typical accessories (scissors, pins (straight and safety), seam ripper if you mess up, etc)
Lay your XL t-shirts out and cut off the sleeves and then cut straight across right under the neck line.
Take the skirt off the sewing machine and then jiggle the fabric around until it is even throughout the casing. Put the skirt around your legs and make sure it has the stretch you want. If it is too loose, you will need to pull your elastic and cut a little off.
Next put your elastic pieces together and sew back and forth to secure.
Next, you need to sew up the arm pits that are slits. Make sure your right sides are together and just straight stitch down STRAIGHT. You want it to eventually line up with your side seams of the shirt.
Pin the two pieces of fabric together so that they won't shift.