I chained 220 with a 7mm hook (I always, always use a hook two sizes up for a foundation chain when I'm making a scarf - it stops that annoying curve) and then, using a 6mm hook, simply worked half trebles (half doubles US) in the back loops.
Crocheted Men's Stripe Scarf ~ Make a Vertical Stripe Scarf using this free crochet scarf pattern. It's a unisex design so you can make it for any man or woman. Single crochet is alternated with a single chain making this an easy crochet scarf. Matching fringe added at the end gives this free crochet scarf pattern the perfect finishing touch.