Cast on 70 sts. Work 8 rows of garter stitch
(4 ridges on RS).
Work in st st for 18 rows. Next RS row K2*yo, k2tog* end K2. Repeat the last 18 rows 6 more times or until desired width of garment.
Work 18 more rows in st st. Work 8 rows of garter stitch. Bind off loosely.