KNITTING Gauge: 33-40 sts per 4" in stockinette recommended needle: US000 (1.5 mm) to US1 (2.25 mm)
CROCHET Gauge: 32-42 sts per 4" in US single crochet recommended hook (steel): 8 (1.4 mm) to 6 (1.6 mm) recommended hook (regular): B (2.25 mm)
Recommended needle/hook sizes are only suggestions. When selecting yarn for a project, you should determine the needle/hook size you need to match the pattern gauge by working a swatch.