I have a favorite pattern for a shopping bag = where size is easily adjusted. The only thing I did change up was to pad the handles with batting to make it easier/ softer to grip. My friend had depended upon large brown papers bags with handles in order to carry groceries from car to home. The store stopped carrying bags with handles. The shopping bag I designed and made is large enough for the clerk to insert a paper bag first and then load the groceries.
"30 Minute Shopping Bag" bag pattern designed by Geta Grama is the best $10. investment I've ever made for any pattern. Here's the link:
https://www.getasquiltingstudio.com/...ng-bag-pattern