From Churchmouse:

In 2 sizes, plus a bonus headband

With some very simple knitting—and a little fussy finishing—you’ll have a double layer cowl that’s totally seamless, utterly reversible, and very versatile. Designed for our 2012 LYS (Local Yarn Shop) tour, the two-color version can be worn either color out, or shifted half way for bold color blocking. (We’ve also included a bonus pattern for a totally tubular headband that you can knot, or not.)

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Craft: Knitting.

Skill Level: Beginner/Intermediate

Designer: Churchmouse Yarns

FINISHED SIZES
Small cowl: Approx. 24” / 61cm around x 5½“ / 14cm deep, after grafting or seaming.
Large cowl: Approx. 28” / 71cm around x 9” / 23cm deep, after grafting or seaming.
Headband: Approx. 4” / 10cm wide x 17” / 43 cm around, after knotting and grafting, before stretching.

YARN
Small cowl: Shown in blue: 1 skein Rowan Kidsilk Haze, Color 639. Or approx. 229 yds / 210m of an equivalent lace-weight mohair.
Large cowl: Shown in two tones: 2 skeins Rowan Kidsilk Haze (229 yds / 210m each), Colors 595 and 641. And shown in 1 skein Rowan Kidsilk Haze Stripe (460 yds / 420m), Color 359. Or approx. 460 yds / 420m of an equivalent lace-weight mohair.
Headband: 1 skein Rowan Kidsilk Haze. Or approx. 150 yds / 137m of an equivalent lace-weight yarn.

NEEDLES
Cowls: US 2⁄3 (3mm) 16 (24)“ circular needle, or size to obtain gauge.
Headband: US 2⁄3 (3mm) double-point needles, or size to obtain gauge.
All pieces: Another needle or set of needles (same size or smaller), for grafting.
US D-E (3.25-3.5mm) crochet hook for provisional cast-on.