Yarn Weight Differences
UK and US yarn weight names don't line up exactly — use this as a rough guide, not an exact match.
| UK term | US term | Weight # | |
|---|---|---|---|
| Lace / cobweb (2 ply) | ≈ | Lace | 0 |
| 4 ply | ≈ | Fingering / sock | 1 |
| Double knit (DK) | ≈ | Light worsted / DK | 3 |
| Aran | ≈ | Worsted | 4 |
| Chunky | ≈ | Bulky | 5 |
| Super chunky | ≈ | Super bulky | 6 |
| Jumbo | ≈ | Jumbo | 7 |
Mixing Two Yarns? Here's the Weight You'll Land On
Holding two strands together isn't just a way to change gauge — it's also a great way to add visual interest, like blending colors for a marled effect or adding a strand of metallic or sparkly yarn for extra dazzle.
Beyond the look, combining strands also bumps up the combined weight. Use the chart below as a rough guide — hook size is just a starting point to swatch from, since the actual result depends on your specific yarns. Always swatch to confirm gauge before committing to a project.
| Base yarn | + Second strand | Combined weight | Hook (start here) | Notes |
|---|---|---|---|---|
| Lace (0) | + Lace | Fingering (1) | 2.75–3.25 mm | Still light and drapey. |
| Lace (0) | + Fingering | Sport / Light DK (2–3) | 3.5–4.5 mm | Nice drape, good for summer tops. |
| Lace (0) | + DK | Worsted (4) | 4.5–5 mm | Adds a soft halo if the lace strand is mohair. |
| Lace (0) | + Worsted | Bulky (5) | 6–6.5 mm | Fluffy, plush texture — good for textured pieces. |
| Fingering (1) | + Fingering | DK (3) | 4.5–5 mm | Smooth, even fabric — good for cardigans. |
| Fingering (1) | + Sport | DK / Light Worsted (3–4) | 5–5.5 mm | Good structure for garments. |
| Fingering (1) | + DK | Worsted (4) | 5.5–6 mm | Gives a nice marled look. |
| Fingering (1) | + Worsted | Heavy Worsted / Light Bulky (4–5) | 6–6.5 mm | Squishy and cozy with medium drape. |
| Sport (2) | + Sport | Worsted (4) | 5.5–6 mm | Versatile classic-weight upgrade. |
| Sport (2) | + DK | Worsted / Light Bulky (4–5) | 5–5.5 mm | Denser fabric. |
| Sport (2) | + Worsted | Bulky (5) | 6.5–7 mm | Good for bags, hats, or chunky vests. |
| DK (3) | + DK | Bulky (5) | 6.5–7 mm | Fast growth with great stitch definition. |
| DK (3) | + Worsted | Light Bulky / Heavy Worsted (4–5) | 6–6.5 mm | Good balanced tension. |
| DK (3) | + Bulky | Super Bulky (6) | 9 mm | Sculptural stitches — good for outerwear. |
| Worsted (4) | + Worsted | Bulky (5) | 6.5–7 mm | A reliable combo that works for most bulky patterns. |
| Worsted (4) | + DK | Light Bulky (5) | 6 mm | Slightly leaner. |
| Worsted (4) | + Bulky | Super Bulky (6) | 9 mm | Good for cozy accessories. |
| Bulky (5) | + Bulky | Super Bulky / Jumbo (6–7) | 9–12 mm | Fast results. |
Tripling Up (and Beyond)
For extra structure — think stiff bags, baskets, or floor poufs that need to hold their own shape — crocheters often go beyond two strands. The fabric gets noticeably denser and stiffer, not just thicker, so it behaves differently than a single strand of the equivalent weight.
| Strands | Combined weight | Hook (start here) | Notes |
|---|---|---|---|
| 3× Fingering (1) | DK / Worsted (3–4) | 5.5 mm | Firm fabric — good for amigurumi that needs to hold shape without stuffing showing through. |
| 3× DK (3) | Bulky (5) | 7–8 mm | Sturdy but still workable by hand — a lighter structured option than tripled worsted. |
| 3× Worsted (4) | Super Bulky (6) | 9 mm | The classic combo for structured bags and baskets — stiff enough to stand on its own. |
| 4× Worsted (4) | Jumbo (7) | 12–15 mm | Very stiff and heavy on the hands — best for floor baskets or poufs that need to stand up unsupported. |