Hook size
9 mm crochet hook
A 9 mm crochet hook equals US size M/N-13 and has old UK size 00. It is the recommended hook range for bulky (5) and super bulky (6) yarn, and crocheters typically choose it for super bulky hats, chunky cardigans and quick throws. Always check gauge with a swatch, because tension varies between crocheters.
By the crochetpatterns.io editorial team · Reviewed · Editorial policy
| Metric | US | Old UK | Suits yarn weights |
|---|---|---|---|
| 9 mm | M/N-13 | 00 | #5 Bulky, #6 Super Bulky |
What is a 9 mm crochet hook in US and UK sizes?
A 9 mm hook is US size M/N-13 and old UK size 00. Metric millimetres are the only measurement that is the same on every brand, so check the mm size stamped on the hook.
| Metric | US | Old UK | Yarn weights |
|---|---|---|---|
| 7 mm | — | 2 | #5 |
| 8 mm | L-11 | 0 | #5 |
| 9 mm (this hook) | M/N-13 | 00 | #5, #6 |
| 10 mm | N/P-15 | 000 | #6 |
| 11.5 mm | P-16 | — | #6 |
What yarn weight goes with a 9 mm hook?
A 9 mm hook is typically used with bulky (#5) yarn or super bulky (#6) yarn. Bulky yarn gives about 8–11 sc per 4 in / 10 cm and suits chunky hats, scarves and cowls, quick throws. Super Bulky yarn gives about 7–9 sc per 4 in / 10 cm and suits chunky blankets, baskets, oversized scarves.
| Weight | Also called | Crochet gauge | Recommended hooks |
|---|---|---|---|
| #5 Bulky | Chunky, Craft, Rug, 12-ply (AU/NZ) | 8–11 sc per 4 in / 10 cm | 6.5–9 mm |
| #6 Super Bulky | Super chunky, Roving, 14-ply (AU/NZ, approximate) | 7–9 sc per 4 in / 10 cm | 9–15 mm |
What can you make with a 9 mm hook?
1 pattern in our library use a 9 mm hook, including chunky ribbed crochet beanie worked flat.
