I will never complain of too many bags, big or small, it always fun to make these little knit-knot from my stash basket. A 4.5" by 3.5" coin purse need not use up a lot of stash yarn, with a handsewn 5" zip, no linning needed as single crochet is used throughout.
Material - stash yarn, 3mm clover crochet hook, a 5" zip.
