Reference Guide
Yarn Weight Names
Yarn makers use different names for the same thickness, and sometimes the same name for different thicknesses. This page lines them up.
Not exact: yarn weight names aren't a clean swap between countries, and the name on a label can mislead you. The weight number and the suggested hook size are more reliable, so find your yarn in the chart below and, when in doubt, go by the hook size.
The Chart
Numbers 0 to 7 are the standard yarn weight numbers (the number inside the little skein icon on the label). Hook sizes are a starting point, so always make a swatch.
| Weight # | US names* | UK | Australia | Crochet hook |
|---|---|---|---|---|
| #0 | Lace, cobweb | 1 to 3 ply | 2 ply | 1.6–2.25 mm |
| #1 | Super fine, fingering, sock, baby | 4 ply | 3 or 4 ply | 2.25–3.5 mm |
| #2 | Fine, sport, baby | 4 to 5 ply, light DK | 5 ply | 3.5–4.5 mm |
| #3 | Light, DK, light worsted | DK | 8 ply | 4.5–5.5 mm |
| #4 | Medium, worsted, afghan, aran | Aran | 10 ply | 5.5–6.5 mm |
| #5 | Bulky, chunky, craft, rug | Chunky | 12 ply | 6.5–9 mm |
| #6 | Super bulky, roving | Super chunky | 14 ply and up | 9–15 mm |
| #7 | Jumbo, roving | No standard name | No standard name | 15 mm and up |
How to Read Your Yarn Label
- Look for the number. Most labels have a skein icon with a number from 0 to 7. Find that number in the chart.
- No number? Use the hook size. The label suggests a hook (or needle) size. Match it to the Crochet hook column.
- Swatch before you start. A small test square tells you more than any label.
Holding Strands Together?
Find your single-strand weight above, then see the Combining Yarn Weights guide for the weight you'll land on and a starting hook size.