In case you haven't noticed, I love testing bag patterns! I wouldn't even know where to begin to design a bag, so testing a pattern still allows to be a part of the process, and I find it quite satisfying. My latest testing opportunity was for Blue Calla Sewing Patterns, to test the Rose Gathered Handbag. It features a large opening closed by a flap with a magnetic snap, interior zippered pocket, and large interior divided slip pocket. The defining feature is the gathered side, with ties you can cinch to increase the gather. It also incorporates some hardware to complete the fun retro look.
The only tip I have for this bag is to use a binding maker, if you have one, for the ties. If you don't have one, it might be worth looking into. I picked mine up a while ago for under $10; it's such a great little tool, and prevents burnt fingers, ouch!