I like my bag so much that I wanted to replicate it for the art sale. The final result is a hybrid of the bag I purchased and these that I made last year.
The bag is a little bigger than the average plastic grocery bag. The velcro tab is used to keep the bag rolled up, but also can close the top of the bag when it is full.
Most of the bag is a single layer of cotton, but the handles are faced. There is a double row of top-stitching around both edges of the handles. The sides have a gusset and are sewn with French seams for strength and a clean finish. The bottom is also sewn with a French seam plus an additional row of reinforcing stitching.
To roll up the bag:
Fold the bag into thirds, using the pocket edges as a guide.
Fold the handles down. There will be a twist in one side of the handles.
Fold the bottom of the bag up to be even with the top of the handles.
Roll the bag up into thirds. The velcro on the bottom of the pocket should be visible.
Close the velcro tab and stash the bag somewhere where you will use it, like your purse or in you car's glovebox.
I think these could be great stocking stuffers and I hope other people see them that way, too.