Crochet Hook Sizes: The Complete Buying Guide
Crochet Hook Sizes: The Complete Buying Guide
Choosing the right crochet hook comes down to three things: the size that matches your yarn, the material that suits your hands, and the type that fits your project. This guide covers all three, with a full crochet hook size chart (millimeters to US sizes), material comparisons, and brand recommendations so you can pick with confidence. Ready to shop? Browse the full range of crochet hooks.
Crochet hook sizes chart (mm to US)
Crochet hooks are measured by the diameter of the shaft in millimeters. In the US, hooks also carry a letter or number label. The millimeter measurement is the reliable one, since US letters can vary slightly by brand. Match the hook to your yarn weight, then adjust to meet the gauge in your pattern.
| Metric (mm) | US size | UK/Canada | Typical yarn weight |
|---|---|---|---|
| 2.25 mm | B/1 | 13 | Lace, thread, fine cotton |
| 2.75 mm | C/2 | 12 | Sock, fingering (1) |
| 3.25 mm | D/3 | 10 | Sport (2), amigurumi |
| 3.5 mm | E/4 | 9 | DK (3), amigurumi |
| 3.75 mm | F/5 | - | DK (3) |
| 4.0 mm | G/6 | 8 | DK to light worsted (3-4) |
| 4.5 mm | 7 | 7 | Worsted (4) |
| 5.0 mm | H/8 | 6 | Worsted (4) |
| 5.5 mm | I/9 | 5 | Worsted to aran (4) |
| 6.0 mm | J/10 | 4 | Aran (4) |
| 6.5 mm | K/10.5 | 3 | Chunky (5) |
| 8.0 mm | L/11 | 0 | Bulky (5) |
| 9.0 mm | M-N/13 | 00 | Super bulky (6) |
| 10.0 mm | N-P/15 | 000 | Super bulky (6) |
| 15.0 mm | P-Q | - | Jumbo (7) |
| 16.0 mm | Q | - | Jumbo (7) |
Steel (thread) crochet hook sizes
Steel hooks are used for thread crochet, doilies, and fine lace. They use a separate numbering system where a higher number means a smaller hook.
| Metric (mm) | US steel size |
|---|---|
| 1.75 mm | 5 |
| 1.65 mm | 7 |
| 1.50 mm | 8 |
| 1.40 mm | 9 |
| 1.30 mm | 10 |
| 1.10 mm | 11 |
| 1.00 mm | 12 |
| 0.75 mm | 14 |
How to choose the right crochet hook size
- Start with the yarn label. Every ball band lists a recommended hook size. That is your baseline.
- Check your pattern gauge. Make a small swatch. If you have too many stitches per inch, go up a hook size; too few, go down.
- Adjust for the project. For amigurumi, go one or two sizes smaller than the label so stitches stay tight and stuffing does not show. For drape (shawls, wraps), go up a size for a softer fabric.
Crochet hook materials
- Aluminum: smooth, fast, durable, and affordable. The most common everyday hook. Shop Boye.
- Bamboo and wood: warm to the touch, lightweight, and slightly grippy, which helps with slick yarns like silk or bamboo. Try Brittany Birch and ChiaoGoo.
- Steel: fine and rigid for thread and lace work.
- Plastic and acrylic: light and inexpensive, ideal for jumbo sizes.
- Ergonomic: a metal hook set into a cushioned, contoured handle to reduce hand strain (see below).
Ergonomic crochet hooks (for hand comfort and arthritis)
If you crochet for long stretches or have hand, wrist, or joint pain, an ergonomic hook is worth it. A wider, soft-grip handle reduces the tight pinch a standard hook requires. The Addi Swing and Clover Amour are popular ergonomic choices. Browse all crochet hooks to compare grips.
Inline vs tapered hook heads
Two head shapes dominate crochet:
- Tapered (Boye style): a rounded, pointed head that glides into stitches. Many crocheters find it faster.
- Inline (Bates style): a deeper throat with a flatter head cut in line with the shaft, which can give more even, uniform stitches.
Neither is better. It comes down to how you hold your hook and form stitches. If you split yarn often, try the other style.
Tunisian (afghan) crochet hooks
Tunisian crochet uses an elongated hook that holds many live loops at once, like a cross between crochet and knitting. Long rigid hooks suit small projects, while cabled or interchangeable hooks handle wide blankets. Shop Tunisian crochet hooks.
Individual hooks vs sets
Buy an individual hook when you need one size for a specific project. Choose a crochet hook set when you want a full range on hand, want to try an ergonomic system, or are building your kit. Sets usually cost less per hook and keep everything organized in a case.
Crochet hooks by brand
- Boye - classic American tapered aluminum, steel, and jumbo hooks, plus the CrochetMaster set.
- Clover - ergonomic Amour, cushioned Soft Touch, and Takumi bamboo, made in Japan.
- Addi - German-made ergonomic Swing and extra-long Swing Maxi.
- ChiaoGoo - Moso bamboo hooks and T-Spin interchangeable Tunisian sets.
- Brittany Birch - sustainably made wooden hooks.
- HiyaHiya - steel hooks and gift sets.
What hook do I need for amigurumi?
Amigurumi is worked tightly so stuffing stays hidden. Pick a hook one to two sizes smaller than your yarn label suggests. With a DK cotton, that usually means a 3.25 mm (D/3) or 3.5 mm (E/4) hook. Pair it with the right amigurumi yarn for crisp stitch definition.
Frequently asked questions
What is the most common crochet hook size?
The 5.0 mm (H/8) hook is the most widely used because it pairs with worsted weight yarn, the most popular yarn for everyday projects.
Are crochet hook sizes the same as knitting needle sizes?
The millimeter measurement is the same, but the US letter and number labels differ. Always go by millimeters when in doubt. See our yarn weight chart to match yarn to hook.
What size hook for a beginner?
Start with a 5.0 mm (H/8) or 6.0 mm (J/10) hook and a smooth, light-colored worsted yarn. Larger hooks and stitches are easier to see and work.
Does hook material change my gauge?
It can. Slick metal hooks work up slightly faster and looser than grippier bamboo, so always swatch when you switch materials.
Ready to choose? Shop all crochet hooks at Paradise Fibers, or explore sets, Tunisian hooks, and amigurumi yarn.