If you have ever wondered about how to choose the right size crochet hook or what are all the sizes of a crochet hook this post will help! Learn all about crochet hook sizes, crochet hook types and how to find patterns to use a certain hook size on below.
What is a Crochet Hook?
First, if you are new to crocheting, a crochet hook is a handheld tool that helps create stitches with yarn. Crochet hooks come in many sizes and varieties. Most hooks have the size listed on the thumb area of the hook which is actually the diameter of the shaft of the hook in mm. Sometimes you may hear them referred to as crochet needles, but they are actually called crochet hooks.
Crochet Hook Styles
- Inline Crochet Hooks: These types of hooks have a deeper throat and are pointier tip with a flatter thumb rest that according to some can help with tension and gauge in patterns.
- Tapered Crochet Hooks: These crochet hooks a rounded point with a tapered throat and a longer shaft length.
The style of hook you use will depend on your personal preference, so most crocheters will usually try both styles out to see what they like the best. These hooks also may have a rubber grip or larger handle which makes them ergonomic. Ergonomic crochet hooks help crocheters with arthritis and sore hand to crochet longer and with better tension.
What Size Crochet Hook Do I Need?
Crochet hooks come in many sizes and types. They are always referenced in either the US or Metric sizes which you can learn more about below in with our conversion chart. Learning about crochet hooks will help you as a crocheter determine what size crochet hook is best for a pattern as well as what type of hook is best to use. You can use these methods below to help decide which hook size is best for the project you are working on.
- Yarn Label: The yarn label usually recommends what hook size to use as well as gives you the fiber content. Most labels have a section that outlines what hook size to use in metric and us sizes as well as the gauge.
- Gauge Swatch: A gauge swatch is also a good way to determine what hook size is best. Most labels like mentioned above have the gauge swatch listed. You can work up the swatch with the recommended hook and stitches to see if the hook size works for you. If it is too big use a smaller hook and if it is too small use a bigger hook.
- Pattern: The pattern you wish to work on will also have a hook size listed. If it doesn’t the best thing to do is to contact the designer.
Below I’ve created a handy crochet comparison chart that lists crochet hooks in both US and metric sizes and how to convert one from the other. Scroll down to take a look at the crochet hook chart!
Crochet Patterns by Hook Size
All of our free crochet patterns are tagged with the hook size they use. If you are looking for a crochet pattern to use with a specific hook size, check out our archives below.
Material Types of Crochet Hooks
Crochet hooks are made in a variety of different material. The hook that works best for you is a personal preference and will vary from crocheter to crocheter. Let’s learn about the different types of crochet hooks that are available below.
- Steel: Steel crochet hooks are great for crocheting with thread (to make doilies for example) since they are the smallest hook sizes available. (see the chart below)
- Plastic: These types of hooks are usually the cheapest to buy but may not last as long as other varieties.
- Aluminum: The most widely available hook and a great beginner hook to use when learning how to crochet. Brands include Susan Bates and Boye.
- Wood: Crochet hooks made of wood that can sometimes be colored and or hand carved.
- Tunisian: Also known as an Afghan hook these long crochet hooks (sometimes with cables) are used by keeping the yarn on the hook the entire time while crocheting. Learn more about Tunisian Crochet.
- Bamboo: Crochet hooks made of Bamboo and usually inexpensive.
- Ergonomic: Made to reduce strain on a hand when crocheting with a larger handle. Brands include Clover, Furls and Tulip.
Popular Crochet Hook Brands
Clover is one of my favorite hook sets that have all the common hook sizes.
Tulip is another set of hooks that is great to have and comes with a hook organizer, scissors and yarn needle.
US and Metric Crochet Hook Sizes
As mentioned before, the diameter of a hook shaft determines the size of the hook and the size of the stitches that are made. Hook sizes are measured in millimeters and are available from as small as 2 mm to 20 mm or bigger!
The usual rule of thumb is the bigger or thicker the yarn the bigger size hook you will need. Hooks can be labeled with US sizes or metric sizes so this chart is a great reference for comparison.
Since they are many manufacturers of hooks, please take the time to check the size of the hook and your gauge when crocheting a pattern. The difference in sizes in hooks and manufacturers is one of the good reasons to have our chart in arms reach!
All Crochet Hook Sizes
US Vs UK Hook Sizes
Here we show you all the US sizes of hooks, and their Metric and UK equivalents in our crochet hook conversion chart.
| US Size | Metric Size | UK Size |
|---|---|---|
| B/1 | 2.25 mm | |
| C/2 | 2.5 mm , 2.75 mm | 12 |
| D/3 | 3 mm, 3.25 mm | 11, 10 |
| E/4 | 3.5 mm | 9 |
| F/5 | 3.75 mm, 4 mm | |
| G/6 | 4 mm, 4.25 mm | 8 |
| 7 | 4.5 mm | 7 |
| H/8 | 5 mm | 6 |
| I/9 | 5.5 mm | 5 |
| J/10 | 6 mm | 4 |
| K/10.5 | 6.5 mm, 7 mm | 3, 2 |
| L/11 | 8 mm | 0 |
| M/N/13 | 9 mm | 0 |
| N/P/15 | 10 mm | 0 |
| P/Q | 15 mm | |
| Q | 16 mm | |
| S | 19 mm |
Steel Crochet Hook Sizes
Usually used for crochet threads and lightweight yarns. These metal hooks numbers size decreases when the diameter increases.
| Metric Size | U.S. Size |
|---|---|
| 3.50 mm | 00 |
| 3.25 mm | 0 |
| 2.75 mm | 1 |
| 2.70 mm | 00 |
| 2.55 mm | 0 |
| 2.35 mm | 1 |
| 2.25 mm | 2 |
| 2.20 mm | 2 |
| 2.10 mm | 3 |
| 2 mm | 4 |
| 1.90 mm | 5 |
| 1.80 mm | 6 |
| 1.75 mm | 4/0 |
| 1.70 mm | 5 |
| 1.65 mm | 7 |
| 1.60 mm | 6 |
| 1.50 mm | 8/7/2 |
| 1.40 mm | 9/8 |
| 1.30 mm | 10 |
| 1.25 mm | 9/4 |
| 1.15 mm | 10 |
| 1.10 mm | 11 |
| 1.05 mm | 11 |
| 1 mm | 12/6 |
| 0.95 mm | 13 |
| 0.90 mm | 14/8 |
| 0.85 mm | 13 |
| 0.75 mm | 14/10 |
| 0.60 mm | 12 |
Get a Copy of our Crochet Hook Size Chart
Enter your email address below to download our “Crochet Hook Sizes Chart” reference chart. This chart will come in handy when you are trying to convert US hook sizes to Metric (or vice versa).
Common Crochet Hook Questions for Beginners
What Size is a G Crochet Hook?
A G/6 is a 4.00 mm size crochet hook most commonly but can be a 4.25 mm such as with the brand Boye. A G crochet hook is considered an 8 in UK & standard Canadian hook size charts.
What Letter is a 2.75 mm Crochet Hook?
A 2.75 mm crochet hook is considered a C/2 in US hook sizes and is best for superfine weight yarn.
What is a Size P Crochet Hook Conversion?
A size P crochet hook in US is most commonly a 15 mm hook in metric terms. But some brands may label P crochet hooks as 10 mm so keep that in mind when crochet hook shopping.
What is a Size 3.00 mm Equivalent to in a US Size?
A 3.00 mm crochet hook is a D/3 size crochet hook in the US. Some companies may use a D size label on a 3.25 mm crochet hook too.
What is The Most Commonly Used Crochet Hook Size?
The most common size is a H/8 5 mm crochet hook. It is the perfect size to make blankets, scarves and more since it is not too small and not too large.
What Size is a 12 Crochet Hook?
A size 12 crochet hook is a Canadian / UK size that is equivalent to a 2.5 mm or C/2 in the US.
Happy Crocheting!
OO steel hook
Hi! It’s 3.5 mm.