This week on my new Addi 20cm needles from Loveknitting.com are these bright and useful wash cloths. You can also buy the Addi needles in 35cm length (I have both!) I've been knitting mine in Debbie Bliss Cotton DK, its lovely to knit with and great stitch definition. If you can get your hands on discontinued colours it makes it a reasonably priced gift.
Cast on 35 stitches, knit the first 3 or 6 rows, then K4 for border, K1, P1, K1 to last 4 stitches, K4 for border. Knit until piece measures 8" then knit the last 3 or 6 rows and cast off knit wise. Sew in ends. That's it. These make perfect Christmas gifts with a bar of soap and gift wrapped with a hand-knitted wrapper. You can print the gift wrapper here