Hook size
2.25 mm crochet hook
A 2.25 mm crochet hook equals US size B-1 and has old UK size 13. It is the recommended hook range for super fine (1) yarn, and crocheters typically choose it for sock yarn, fine baby garments and small detailed amigurumi. Always check gauge with a swatch, because tension varies between crocheters.
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| Metric | US | Old UK | Suits yarn weights |
|---|---|---|---|
| 2.25 mm | B-1 | 13 | #1 Super Fine |
What is a 2.25 mm crochet hook in US and UK sizes?
A 2.25 mm hook is US size B-1 and old UK size 13. 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 |
|---|---|---|---|
| 2.25 mm (this hook) | B-1 | 13 | #1 |
| 2.75 mm | C-2 | 12 | #1 |
| 3.25 mm | D-3 | 10 | #1 |
What yarn weight goes with a 2.25 mm hook?
A 2.25 mm hook is typically used with super fine (#1) yarn. Super Fine yarn gives about 21–32 sc per 4 in / 10 cm and suits socks, lightweight shawls, baby garments.
| Weight | Also called | Crochet gauge | Recommended hooks |
|---|---|---|---|
| #1 Super Fine | Sock, Fingering, Baby | 21–32 sc per 4 in / 10 cm | 2.25–3.5 mm |
What can you make with a 2.25 mm hook?
1 pattern in our library use a 2.25 mm hook, including esplanade two-color hairpin lace stole (1951).
