Using a 5.5 mm hook, chain 20 sts.
Turn, and SC to the end. Chain 1, turn and SC to the end.
Repeat this until your work is square.
Do a half double crochet border around the dish cloth, followed by a scalloped edge. Half double crochet in every stitch all the way around the dish cloth.
For the scalloped edge, skip 1, 5DC in the next st, skip 2, sc, skip 1, 5DC, and repeat all the way around the dish cloth, chaining 2 at each corner. Weave in ends.
It works well to use a contrasting color for the border.
This can be done in one afternoon, so it's a quick and easy way to use up your yarn.