This my verison of the Singlet bag. I changed it because I made it for my grandmother who is partial paralized. I did not use a pattern either. I just used at least 1/2 yrd for each fabric.
I added a straps, zipper and made a matching pouch.
I added a pocket inside for personal use. I attached a zipper to the lining and the pocket (this is easier than I thought).
thanks for the idea.