I love love love these knitted or crocheted wash cloths. I use them in the kitchen all the time. I am making them for gifts this year and giving them with a bar of my homemade soap.
They are easy to knit. I use size 8 knitting needles. Here's how to do it.
Waffle Knit Wash Cloth
Cast on 38 stitches.
Knit 3 rows for border.
Row 1: (right side): Knit.
Row 2: K 3, purl to last 3 stitches, k 3.
Row 3: K 3, (P 2, k 1) 10 times, p 2, k 3.
Row 4: K 3, (K 2, p 1) 10 times, k 5.
Repeat Row 1-4 approximately 12 times or until you reach the size you like. Knit 4 rows for your border and bind off as usual.