1. Draw the sharp that you like and cut the old T-shirt.
2. Cut through both layers into 2 identical pieces according to the size you like.
3. Stitch 2 pieces together all the way around, and left the bag's opening untouched.
4. To prevent fraying, either serge or apply a narrow zigzag stitch to the edge.
5. Draw the dashes across the t-shirt as shown in the picture at below.
6. Cut the fabric as following the dashes you draw.
7. Stretch the bag