Lace yarn (CYC 0)
The short answer
This yarn is called Lace in the US and 1 ply in the UK, gokuboso in Japan. Use a hook between 1.4 mm and 2.25 mm with it.
CYC weight 0 — Lace in the US, 1 ply in the UK, gokuboso (極細) in Japan. Doilies, thread lace, filet crochet, fine shawls.
| CYC number | 0 |
|---|---|
| US | Lace, Thread, Cobweb, 10-count crochet thread |
| UK | 1 ply, 2 ply, 3 ply |
| Australia | 2 ply, 3 ply |
| Japan | 極細 (gokuboso, "extra fine") unverified |
| Wraps per inch | 30+ |
| Hook range | 1.4–2.25 mm |
| Single crochet gauge | 32-42 sts / 4 in |
On Japanese yarn
Japanese yarn is normally sold by ball weight with a stated metres-per-gram rather than by a
weight category. The names above are conventional descriptions, not a standard. When substituting,
match metres per gram, not the category name.
Hooks for this weight
Lace yarn
Acrylic, cotton and wool options at this weight.
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Other weights
Last updated 2026-08-30.