I like the simple scalloped crochet edge, ‘specially when I give as a gift.
Crochet Scallop Edge:
1 row of sc around finished dishcloth, (3sc in ea corner st), ch 1.
Scallop row: *1 dc, ch1 + 1 sc in next st, sk 1 st, repeat from *
till you’re back to the original corner & it looks nice!
Here is the link to the Eloomanator Diagonal Dishcloth: http://eloomanator.eloomanation.com/docs/Eloomanator_Diagonal_Knit_Dishcloth.pdf
And the link to the basic favorite dishcloth: