The shape is based on a neckwarmer my great aunt knit years ago which was wearing out.

Yarn: Suri Alpaca (locally raised in Three Oaks) 3-ply fingering weight, held doubled
Needles: US6

Stitch Pattern:  Woven Cable from Big Book of Knitting Stitch Patterns

CO 2 st, increase every other row with kfb on the 2nd and 2nd to last st, knit all rows (garter stitch).  At desired width, begin decreasing with ssk/k2tog on the 2nd and 2nd to last st.  At desired width, switch to 1×1 ribbing for 2 1/2 in. Begin working stitch pattern, with 3 garter stitches on each side.  Knit desired length (approx. 12 in).  Switch to 1×1 ribbing and do all decreases and increases to create symmetric end.  Pick up stitches on back of one side where pattern meets the ribbing; knit garter st for length of ribbing.  Do quasi-three needle bind off (that is, one of the “needles” is the scarf) to connect this square to the scarf.

 Ravelry.