The straight shape begins with ribbing and a simple garter stitch edging.
The cable involves the use of 2 cable needles, worked over 2 successive rows. The intermittent rows are worked in a stacking rib and slipped stitch pattern.
As the stitch lends itself to either a square or rectangle, it could easily be customized to become your personal favorite dimension.
I’m smitten with the versatility of this stitch.

Wrap 10 skeins (1920 yards) Elsebeth Lavold Silky Wool (55% wool, 35% silk, 20% nylon, col. 116, 192 yards per skein)
Gauge in pattern - 36 stitches and 48 rows = 4 inches
Sample was knit with US6
Dimensions - 20 x 77 inches

Scarf 4 skeins (832 yards) Kathmandu Aran 100 (85% extrafine merino, 10% silk, 5% cashmere, 208 yards per skein)
Gauge in pattern - 30 stitches and 28 rows = 4 inches
Sample was knit with US7
Dimensions - 11 x 71 inches