Super Fine yarn (weight 1)
Super Fine is weight 1 on the Craft Yarn Council’s scale, the numbering every yarn label uses. You will also see it sold as Sock, Fingering, Baby.
Very light yarn for socks, baby items, and fine shawls. Slow to work up, but produces soft, drapey fabric.
What hook to use with super fine yarn
The Craft Yarn Council suggests 2.25–3.5 mm (US B-1 to E-4). Every hook in that range, each with its own conversions:
- B-1 — 2.25 mm (UK 13)
- 2.5 mm (UK 12)
- C-2 — 2.75 mm
- 3 mm (UK 11)
- D-3 — 3.25 mm (UK 10)
- E-4 — 3.5 mm (UK 9)
The gauge to expect
About 21–32 single crochet to 4 inches (10 cm) over a hook in the range above.
If you are working from a yarn whose ball band is long gone, wrapping it around a ruler gives 14–30 wraps per inch at this weight. Read that one way only: a weight tells you roughly what you will count, but a count does not tell you the weight — the Craft Yarn Council’s own ranges overlap heavily, so 14 wraps is legitimately super fine, fine or light, and wrapping tension varies between two people counting the same yarn.
Your own gauge decides your finished size, not the chart — the gauge calculator turns a swatch into the numbers a pattern is asking for.
The weights either side
See all eight weights in one chart →
Tired of a notebook and four apps?
This chart lives inside Crochet Bobble, along with the rest of the toolbox: what yarn you already own, which row you were on, how much a blanket will take — in one app that works when the signal doesn’t.
Crochet Bobble opens Winter 2026 — waitlist members get 2 months free at launch, then the founder price of $7.99/mo for as long as you stay.
You’re on the list — thank you! Look for a note from hello@crochetbobble.com.
That didn’t go through. Please try again, or email hello@crochetbobble.com.
Want to help build it? Apply to be a beta tester →