This pattern includes instructions for:

Lace (2ply) - 4 sizes
Fingering (4ply) - 4 sizes
DK (8ply) - 4 sizes
Worsted (10 ply) - 4 sizes

This gives 16 cowl options to choose from and the necessary information for customising further is also given.

This cowl is worked in the round and looks beautiful in either lightly variegated or solid colours.

Bind off
You can use any bind off that gives a stretchy edge so you can match the cast on edge.

I perform mine all through back of loop as in video below with the addition of knitting each stitch BEFORE performing the bind off of said stitch for extra give.

http://knitting.about.com/od/bindoffs/ss/stretchy-bi…