This reversible edging is a modified version of 1889 Weldon’s Practical Needlework, Volume 2’s “Wheel Edging”. I made several changes. My pattern starts with 13 stitches and has 14 pattern rows. The pattern increases to maximum of 20 stitches before returning to 13 stitches on row 12. The even-numbered rows are all knit and purl except row 12.
Skills needed: long-tail cast on, knit, purl, k2tog, yarn over, yarn over twice and bind off in knit stitch.

Gauge is not important in this pattern. Any block-able yarn/thread will work. Make a swatch to check size and appearance.

4 yards will make about 18 rows (1.4 inches) with #10 crochet cotton thread in the stated gauge.