Hook size
12 mm crochet hook
A 12 mm crochet hook has no standard US letter size and has no old UK number. It is the recommended hook range for super bulky (6) yarn, and crocheters typically choose it for super bulky blankets, doubled-yarn rugs and chunky baskets. Always check gauge with a swatch, because tension varies between crocheters.
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| Metric | US | Old UK | Suits yarn weights |
|---|---|---|---|
| 12 mm | — | — | #6 Super Bulky |
What is a 12 mm crochet hook in US and UK sizes?
A 12 mm hook is not given a standard US letter size and has no old UK equivalent. 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 |
|---|---|---|---|
| 10 mm | N/P-15 | 000 | #6 |
| 11.5 mm | P-16 | — | #6 |
| 12 mm (this hook) | — | — | #6 |
| 15 mm | P/Q | — | #6, #7 |
| 16 mm | Q | — | #7 |
What yarn weight goes with a 12 mm hook?
A 12 mm hook is typically used with super bulky (#6) yarn. 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 |
|---|---|---|---|
| #6 Super Bulky | Super chunky, Roving, 14-ply (AU/NZ, approximate) | 7–9 sc per 4 in / 10 cm | 9–15 mm |