These are all from Missouri Star Quilts. These have box corners. I make them to use as purses. The one I made, I put a flap on it to hold it closed for more of a purse look. (see picture in my next post) You can adjust patterns to make different sizes as well.
Here is one that is more shopping bag size - you can put a zipper in it or not.
https://www.youtube.com/watch?v=xAfNPMXuEyU
and here are some that are more purse tote size - you can use charm squares or jelly rolls or even just use yardage
https://www.youtube.com/watch?v=S7i6Wrl4rZ8
and here
https://www.youtube.com/watch?v=M4-41NHuFe8