For a re-closeable purse seal use a 3D foam square from Scrapbook Adhesives by 3L (I really like how their foam sticky pads have rounded corners - ideal for an open/close project). Lace the purse together with baker's twine or craft thread stitched with a tapestry needle. Use blanket stitches or oversewing.
Here are your digi-downloads:
Here's what the pattern template looks like: