This was a garter stitch back and forth that I finished by knitting 2 stitches together as I finished it off. That's how I got the ruffle.
This knit cord is so cool. You cast 3 stitches onto double pointed needles and knit the 3 sts. Don't turn work but slide the stitches to other end of needle and knit them again by pulling the yarn tightly across the back of the work, then repeat. When it's the length you want, take the yarn through the stitches and secure.