Here is the pattern for the Circular Crocheted Dish Cloths:
1 Skein acrylic any color yarn
Ch 6, SS in the first Ch, Sc all the way around.
Row 1 - Sc in every Sc all the way around.
Rows 2-4 - Ch 3, Dc in the first stitch, Dc in the second stitch, 2 Dc in the third stitch, repeat pattern all the way around (1,1,2,1,1,2).
Row 5 - Ch 1, Sc in the first stitch, Sc in the second stitch, 2 Sc in the third stitch, repeat pattern all the way around (same as rows 2-4 but sc instead).
Pull enough yarn out to make a loop, and cut. Tie the loose end of the yarn to the dish cloth to make a loop.
To make it bigger just add more rows in the "rows 2-4" area. You don't have to do just Sc and Dc, I have done plain Sc, and I have substituded Double Crochet with Triple Crochet. You can do tons of different patterns.
The Square/Rectangular ones are really easy, you just chain however long you want it and they you can do whatever stitchet you want.
I created the Circular dish cloth pattern so please do not sell it. :)