This reversible edging looks more like shaggy diamonds than lozenges! I changed a few stitches and corrected an error in the original pattern from 1889 Weldon’s Practical Needlework, Volume 2. The edging starts with just 15 stitches. The stitch count increases to 26 over 9 pattern rows before returning to 15 stitches on the 10th (last) row. Except for row 10, all the even-numbered rows are knit and purl stitches only. This edging is best used on a curved edge.
Skills needed: long-tail cast on, knit, purl, slip, k2tog, yarn over, yarn over twice, SK2P (slip1, knit 2 together, PSSO) 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.

8 yards will make about 22 rows (1.6 inches) of the lozenge border pattern with #10 crochet cotton thread in the stated gauge.