Inspired by a long, narrow triangular scarf that I wear a lot, this reversible scarf is light and drapey. It begins with a reversible 8-stitch cable bordered on each side by a single k1, p1 rib. This cable is increased to 20 stitches, then splits into two mirrored cables that provide a stable frame for the not-too-lacy interior, which increases by one stitch every four rows to the maximum width, then decreases by one stitch every four rows. The two cable panels merge together and the scarf ends with a single reversible cable to match the beginning.
For a denser look, substitute garter stitch for the interior chain-lace pattern; for a lacier look, substitute yarnovers for the make-one (M1) increases in the chain-lace pattern.
You can make this scarf longer or shorter by working more or fewer 24-row pattern repeats. Every repeat added or omitted in each half will alter the length by 48 total rows, or about 4” (10 cm).
The scarf shown used 52 grams of yarn, or just over half of a 100-gram skein.