CROCHET PATTERN: A close fitting balaclava pattern with a modified half double crochet stitch. The resulting fabric is dense, warm, and aesthetically similar to knit. Easily adjust the neck warmer portion in both length and width. 
 
SKILL LEVEL: Moderate
 
SIZES: Baby, toddler, child, adult small, adult medium, adult large. For best fit, choose a circumference approximately 1"/2.5cm of actual head circumference (see size chart in photos).
 
BABY: Finished hat circumference 15"/38.5cm
TODDLER: Finished hat circumference 17"/43cm
CHILD: Finished hat circumference 19"/48cm
ADULT SMALL: Finished hat circumference 21"/53cm
ADULT MEDIUM: Finished hat circumference 22.5"/57.5cm
ADULT LARGE:Finished hat circumference 24.5"/62.5cm
 
HOOK:  4mm hook (or hook size that achieves correct gauge) and a 3mm hook (or hook size 1mm smaller that the hook size used to achieve correct gauge).
 
YARN: Approximately 140 (180, 220, 270, 325, 385) yards of worsted weight yarn.
 
MAIN GAUGE: Main Gauge: 12.5 stitches & 20 rows = 4”/10cm in modified half double crochet.
 
RIBBING GAUGE: Ribbing Gauge: 20 stitches & 17 rows = 4”/10cm in single crochet in the back loop only.
 
NOTIONS: 
Scissors
Tapestry needle