With a cowl shawl like this, you can always be sure that you are well protected against cold weather. The pattern includes directions for sizes XS-5X. You can use worsted weight yarn and a 6.5 mm crochet hook for this cowl.
You can find the free crochet pattern of the Balsam Alpine Cowl on the website of Cre8tion Crochet.
Related stitch tutorial: How to crochet the Alpine Stitch