Sample knit with worsted weight yarn, US size 6 needles
Since this is stockinette based, the edges do curl; depending on how you plan to use the stitch, you may want to consider adding a border to help it lay flat. You may also know this stitch as Cocoon Stitch.
Multiple of 6 + 3
MT = make tail --- to make the tail:
k1, turn work
using the knitted cast on, cast on 5 sts, then bind off the same 5 sts
wyif, slip first st on right needle back to left needle, turn work
Row 1 (RS): knit
Row 2: purl
Row 3: *k1, MT, k4; rep from* to last 3 sts, k1, MT, k1