Crochet Patterns by Yarn Weight: The Complete Craft Guide
From delicate #0 Lace doilies to chunky #7 Jumbo throws, understand yarn thickness, hook pairings, and project suitability.
Select a Yarn Weight Category (#0 to #7)
Click any standard Craft Yarn Council weight to inspect recommended hook sizes, average stitch gauge, wraps per inch, and project suitability.
Worsted / Afghan / Aran
UK / Australia Equivalent: 10 ply • Wraps per inch: 9–11 WPI
- Throw blankets
- Beanies & hats
- Amigurumi plushies
- Market tote bags
Balanced warmth and moderate drape. Stitches stand out with crisp clarity.
Craft Yarn Council (CYC) Standard Reference Table
Cross-reference gauge benchmarks, recommended crochet hooks, and wraps per inch across all eight standard yarn weights.
| Weight & Name | UK / AU Ply | Hook (mm / US) | Gauge per 4" (SC) | Wraps / Inch | Typical Projects |
|---|---|---|---|---|---|
| 0 Lace (Lace / Thread) | 1-2 ply | 2 mm (Steel 6, 7, 8 or B-1) | 35 sts, 40 rows | 30–40+ WPI | Fine doilies, Lace shawls |
| 1 Super Fine (Fingering / Sock / Baby) | 3-4 ply | 2.75 mm (B-1 to E-4 (C-2 / 2.75mm typical)) | 28 sts, 32 rows | 19–22 WPI | Durable socks, Lightweight baby garments |
| 2 Fine (Sport / Baby) | 5 ply | 3.5 mm (E-4 to 7 (E-4 / 3.5mm typical)) | 20 sts, 24 rows | 15–18 WPI | Summer tops, Baby blankets |
| 3 Light / DK (DK / Light Worsted) | 8 ply | 4.5 mm (7 to I-9 (7 / 4.5mm or G-6 / 4.0mm)) | 16 sts, 20 rows | 12–15 WPI | Garments & sweaters, Heirloom baby blankets |
| 4 Medium / Worsted (Worsted / Afghan / Aran) | 10 ply | 5.5 mm (I-9 to K-10.5 (I-9 / 5.5mm or H-8 / 5.0mm)) | 13 sts, 15 rows | 9–11 WPI | Throw blankets, Beanies & hats |
| 5 Bulky (Bulky / Chunky / Craft) | 12 ply | 7 mm (K-10.5 to M-13 (K-10.5 / 6.5mm or L-11 / 8.0mm)) | 10 sts, 11 rows | 7–8 WPI | Quick winter beanies, Chunky throw blankets |
| 6 Super Bulky (Super Bulky / Roving) | 14+ ply | 10 mm (M-13 to Q (N-15 / 10.0mm typical)) | 7 sts, 8 rows | 5–6 WPI | One-hour gift beanies, Storage baskets |
| 7 Jumbo (Jumbo / Giant) | Arm / giant crochet | 16 mm (Q, S, or larger) | 4 sts, 5 rows | 1–4 WPI | Giant arm-crocheted blankets, Pet beds |
How to Measure Wraps Per Inch (WPI)
If you have a mystery yarn without a ball band, wraps per inch (WPI) reveals its true weight category:
- Grab a standard wooden ruler or smooth pencil.
- Wrap the mystery yarn snugly around the ruler for several inches without pulling tightly or overlapping strands.
- Count how many strands fit inside exactly 1 inch.
- Match your count against the reference table above (e.g. 9–11 wraps = #4 Worsted weight).
Holding Yarn Double (Substitution Formulas)
Combine thinner strands from your stash to produce heavier yarn weights without buying new skeins:
- 2 Strands of #1 Fingering ≈ 1 Strand of #3 DK
- 2 Strands of #3 DK ≈ 1 Strand of #5 Bulky
- 2 Strands of #4 Worsted ≈ 1 Strand of #6 Super Bulky
Yarn Weight Standards FAQ
Answers regarding CYC classifications, yarn thickness, and hook matching.
What is the Craft Yarn Council (CYC) yarn weight system?
Can I substitute one yarn weight for another in a pattern?
Which yarn weight is easiest for crochet beginners?
How does yarn weight affect yardage requirements?
Related Crochet Calculators & Topic Guides
Plan your projects with math-verified precision across our craft tools.
Worsted Weight Projects
Discover the best worsted weight (#4) crochet projects. Calculate stitch counts, hook recommendations (5.0mm H-8), yardage requirements, and pattern ideas.
Yardage Calculator
Calculate how many yards or meters of yarn you need for blankets, scarves, sweaters, and custom dimensions based on your gauge and stitch type.
Gauge Calculator
Calculate your exact stitches and rows per inch, determine foundation chain count for any target dimension, and adjust hook sizes to achieve pattern gauge.
Pattern Generator
Generate custom, mathematically accurate crochet patterns tailored to your exact gauge swatch, body or home dimensions, yarn weight, and stitch style.
Leftover Yarn Projects
Have leftover yarn? Enter your exact leftover yardage or grams to find matched crochet patterns, from mini coffee cozies to hats and cowl scarves.