Imagine all the great things you can make using this technique .. towels, throws, rugs, maybe even a shawl if you're able to create a pattern on your own :)
Domino Square Potholder
Measurements: 7.5" x 7.5" (19 x 19 cm) without border, 8" x 8" (20 x 20 cm) with border
Yarn: DK weight cotton yarn
Colors: Purple, fuchsia, and violet
Needles: Dn 4 (3.5 mm). Circular needle 4 (3.5 mm) for the border.
K-CO: knitted cast-on
dn: domino needle (see info below)
How to Knit a Basic Domino Square
Using the knitted cast-on, CO 25 stitches.
Row 1 (WS): Knit to the last st, p1. Mark the center three stitches.
Row 2 (RS): (Note: The yarn tail hangs at the right side.) Sl 1 kwise, knit to marker before center 3 sts (=k10), sl 1 kwise, k2tog, psso, knit to the last st (= 10sts), p1 (= 23 sts).
Row 3 and all WS rows: Sl 1 kwise, knit to last st, end p1.
Row 4: Sl 1 kwise, knit to marker before center 3 sts (= k9), sl 1, k2tog, psso, knit to last st (= k9), end p1 (= 21 sts).
Row 6: Sl 1 kwise, knit to marker before center 3 sts (= k89), sl 1, k2tog, psso, knit to last st (= k8), end p1 (= 19 sts).
Row 8: Sl 1 kwise, knit to marker before center 3 sts (= k7), sl 1, k2tog, psso, knit to last st (= k7), end p1 (= 17 sts).
Continue in this manner until 3 sts remain.
Next row (WS): Sl 1 kwise, k1, p1.
Next row: Sl 1, k2tog, psso (= 1st) This is a live stitch that you will use when you knit the next square.
Knitted "Mouse Teeth" Picot
With circular needle, purple yarn, and right side facing, pick up and knit 75-76 stitches in the stitches of the CO row. Knit 1 row.
New row: *Using the first stitch on the needle as the beginning stitch, K-CO 2 new stitches, BO 4 stitches, move the stitches on the right needle to the left needle*; repeat *-*. Cut yarn and pull tail through last stitch.
Domino Needles (Dn)
According to Vivian Høxbro, "A pair of domino needles is absolutely indispensable. The needles are only about 8" (20 cm) long, with a knob on one end so that the needle ends won't get stuck in your clothes or your knitting."
I agree, knitting small pieces is easier if you use short needles. You can buy short needles if you want to or simply place point protectors on a pair of double-pointed needles and use those. Double-pointed, double-duty! When you need to return the needles to their set, just take off the point protectors and you're good to go. I use DPNs all the time when I'm knitting scarves or baby clothes.
You could also use circular needles; I'd recommend 24-inch needles because 16-inch circulars are too short to comfortably work with, and a cable longer than 24 inches can be awkward when you're turning your work all the time.
Another reason that short needles are great in this type of knitting is because you use less movement when you're turning the work, which is a good thing and helps avoid repetitive-motion injuries.