Jumbo yarn (CYC 7)
The short answer
This yarn is called Jumbo in the US and Jumbo in the UK. Use a hook between 15 mm and 25 mm with it.
CYC weight 7 — Jumbo in the US, Jumbo in the UK. Arm crochet, rugs, oversized decor.
| CYC number | 7 |
|---|---|
| US | Jumbo, Roving |
| UK | Jumbo |
| Australia | Jumbo |
| Japan | no conventional name at this weight |
| Wraps per inch | 1-4 |
| Hook range | 15–25 mm |
| Single crochet gauge | 6 and fewer 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
Jumbo yarn
Acrylic, cotton and wool options at this weight.
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Other weights
Last updated 2026-08-30.