Hook size
3.25 mm crochet hook
A 3.25 mm crochet hook equals US size D-3 and has old UK size 10. It is the recommended hook range for super fine (1) yarn, and crocheters typically choose it for sock yarn projects and tightly worked small amigurumi. 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 |
|---|---|---|---|
| 3.25 mm | D-3 | 10 | #1 Super Fine |
What is a 3.25 mm crochet hook in US and UK sizes?
A 3.25 mm hook is US size D-3 and old UK size 10. 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 | B-1 | 13 | #1 |
| 2.75 mm | C-2 | 12 | #1 |
| 3.25 mm (this hook) | D-3 | 10 | #1 |
| 3.5 mm | E-4 | 9 | #1, #2 |
| 3.75 mm | F-5 | — | #2 |
What yarn weight goes with a 3.25 mm hook?
A 3.25 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 3.25 mm hook?
4 patterns in our library use a 3.25 mm hook, including gold coast hairpin lace scarf (1951), style no. 3603 lace triangle shawl (1953), style no. 3611 pearl-trimmed circular shawl (1953), lyric scalloped strip stole (1960).
Patterns using a 3.25 mm hook

Gold Coast Hairpin Lace Scarf (1951): vintage crochet pattern
- Skill level
- Intermediate
- Yarn weight
- Super fine (#1)
- Hook size
- 3.25 mm hook
- Yardage
- Amount as printed
Free preview · in bundle

Style No. 3603 Lace Triangle Shawl (1953): vintage crochet pattern
- Skill level
- Intermediate
- Yarn weight
- Fine (#2)
- Hook size
- 3.25 mm hook
- Yardage
- Amount as printed
Free preview · in bundle

Style No. 3611 Pearl-Trimmed Circular Shawl (1953): vintage crochet pattern
- Skill level
- Intermediate
- Yarn weight
- Fine (#2)
- Hook size
- 3.25 mm hook
- Yardage
- Amount as printed
Free preview · in bundle

Lyric Scalloped Strip Stole (1960): vintage crochet pattern
- Skill level
- Advanced
- Yarn weight
- Super fine (#1)
- Hook size
- 3.25 mm hook
- Yardage
- Amount as printed
Free preview · in bundle

