KNITTING:
Bulky Gauge: 12-15 sts per 4" in stockinette
recommended needle: US9 (5.5 mm) to US11 (8 mm)
Super Bulky Gauge: 7-11 sts per 4" in stockinette
recommended needle: US11 (8 mm) to US17 (12.75 mm).
CROCHET:
Bulky Gauge: 8-11 sts per 4" in US single crochet
recommended hook: K (6.5 mm) to M (9 mm)
Super Bulky Gauge: 7-11 sts per 4" in US single crochet
recommended hook: M (9 mm) to Q (15 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.