Crochet Hook Sizes - Handy Size Chart & The Sizing Facts (2024)

If you’re a beginner crocheter, do you understand crochet hook sizes? Not yet? Don’t worry. It’s simple, follow the charts below. I’m here to help crocheters like you find the right hook size for your projects. My helpful charts will be your go to guides!

Crochet Hook Sizes - Handy Size Chart & The Sizing Facts (1)

I reviewed, fact checked and updated this post on April 5, 2023.

Table Of Contents

  • Sizes Of Crochet Hooks
  • Crochet Hook Conversion Chart
  • Steel Hook Crochet Sizes
  • What Size Crochet Hook To Use

How Do You Know What Size To Use?

Beginners often ask me this question. They want to know what crochet hooks they should use for their projects to get the best result.

Here are methods to decide what hook size you need.

  • Yarn Label – This gives information on what standard crochet hook size to use, in metric and US sizes and the recommended gauge – how many stitches in a 4×4 inch swatch (Plus more info on care, fiber content.)
  • Gauge Swatches – It’s important to work the swatch with the recommended hook in order to get the amount of stitches in a row. If you have more stitches in the 4 inches then your project will be too small. Use bigger hook if it’s too small. If you have fewer stitches in the 4 inches, then it will be too big. Try a smaller hook if it’s too big.
  • Crochet Patterns include crochet hook sizes too. Ask the pattern designer to choose the right size if it doesn’t.
Crochet Hook Sizes - Handy Size Chart & The Sizing Facts (2)

Note: Hook sizes (in mm) vary from the crochet hook brands. No standard set size for crochet hooks exists yet. This measurement guide is for reference only.

I know, the inconsistency between each brand is a problem, and it can be a challenge to figure out, but I’m here for that! Don’t change hooks mid-project, it will change your tension. Because of the variety of material, manufacturer differences and styles, use the same hook throughout.

You might run out of yarn if you use different hook sizes when using a kit. Be aware that different hook manufacturers may have a letter size that varies in millimeter size. For example Boye labels their G Hook as 4.25 mm not 4.00mm.

It’s super important to complete a swatch with the recommended hook in the pattern to see if you reach the required gauge. The right crochet needle size will determine if your stitches match the designer’s gauge.

Every maker has a different tension and when choosing hooks for crochet, swatching is an important matter because you want the design to be the right fit and shape. Many hand made crochet patterns are opting for the millimeter size for the hook, rather than the US letter sizing.

What Are All The Sizes Of Crochet Hooks?

It’s essential to know the conversions when using a crochet pattern written in another country. Crochet Hook sizing can be a little confusing because letters or milimeters are used depending on the country.

The diameter of a hook shaft determines the size of the hook and the size of the stitches. Hook sizes are measured in millimeters and are available from as small as 2 mm to 20 mm or bigger!

As the size of a crochet hook isdetermined by the diameterof the shaft. (The shaft is the space between the thumb area part, the handle, and the hook.) The larger the diameter, the bigger the stitches. Note: I’m not talking about the length of a hook in this post, which is measured from the bottom to the point.

You can convert the diameter of the shaft to United States sizes for these materials. (Uses both numbers and letters of the alphabet.) For example, a US size G hook is 4.00mm in diameter.

  • UK & Canada – numbers
  • Australia & New Zealand – metric sizes

The sizing in other countries varies. Choose a system for you, whether metric or lettering and numbers. The bigger or thicker the yarn, the bigger hook you need. Chunky wool uses a bigger crochet hook.

Steel hooks (“thread hooks”) are only used for fine lace thread. (Use them to make doilies for the home or intricate designs!) They come in numbered sizes, getting larger as the diameter or millimeters get smaller. If the size is big, it’s a sign they’re tiny! These crochet hooks come in varying sizes from the 0.6 mm thickness of size 12 to the 3.25 mm thickness of size 00.

Crochet Hooks For Yarn Weights

The Craft Yarn Council has set out hook sizes for each yarn weight. Here’s how to find the right size crochet hook for different sizes of yarn.

  • 0 (Lace Crochet, Thread) – B/1
  • 1 (Super Fine) – C/2, D/3
  • 2 (Fine) – E/4, F/5
  • 3 (Light, Light Worsted) – G/6, H/8
  • 4 (Medium, Worsted) – I/9, J/10, K/10.5
  • 5 (Bulky) – L/11, M/13
  • 6 (Super Bulky Yarn Weight) – N/15

Need a fiber weights chart? See here. Want some tutorials on finding the correct size? See these ones. They included pictures to help you.

Crochet Hook Conversion Chart And Crochet Hook Sizes

Hope you find this crochet hook size chart on all the sizes helpful! This crochet hook size conversion is for regular crochet hooks, knook hooks, and all categories of Tunisian crochet hooks.

2.00 mm14
2.25 mmB/113
2.50 mm12
2.75 mmC/211
3.125 mmD
3.25 mmD/310
3.5 mmE/4
3.75 mmF/59
4.00 mmG or
4.25 mm
4.50 mmUS77
5.00 mmH/86
5.50 mmI/95
6.00 mmJ/104
6.50 mmK/10.53
7.00 mm2
8.00 mmL/110
9.00 mmM/1300
10.00 mmN/15000
11.50 mmP/16
15.75 / 16 mmQ
19 mmS
Crochet Hook Sizes - Handy Size Chart & The Sizing Facts (3)

Crochet Thread Hook Sizes / Steel Hook Crochet Sizes

These needle sizes are for thread crochet hooks, used for thread crocheting. For the best steel hooks on the market, my recommendations are the Clover Amour line or Susan Bates. These things have excellent reviews, and are best-sellers!

3.50 mm00
3.25 mm0
2.75 mm1
2.70 mm00
2.55 mm0
2.35 mm1
2.25 mm2
2.20 mm2
2.10 mm3
2 mm4
1.90 mm5
1.80 mm6
1.75 mm4/0
1.70 mm5
1.65 mm7
1.60 mm6
1.50 mm8/7/2
1.40 mm9/8
1.30 mm10
1.25 mm9/4
1.15 mm10
1.10 mm11
1.05 mm11
1 mm12/6
0.95 mm13
0.90 mm14/8
0.85 mm13
0.75 mm14/10
0.60 mm12
Crochet Hook Sizes - Handy Size Chart & The Sizing Facts (4)

How Do You Know What Size Crochet Hook To Use?

Choosing the right-sized crochet hook type follows a process. A Crochet beginner needs to be aware of the importance of gauge. Most crochet patterns have suggested pattern gauge information with a specific crochet hook. This shows how many stitches you should have per inch.

To crochet a swatch – do a swatch of about 4 inches in the stitch pattern you use in your crochet project. Wash your swatch, let it dry and measure the number of stitches. It is super crucial for crocheting items such as a sweater or top.

Suppose your square is smaller – you have more stitches than what the pattern calls for. Size up a hook. Or down one of the crochet needle sizes if your square is too large, that is, you have too few stitches. If you’ve bought yarn and don’t have a pattern in mind, the label suggests the hook size to use and what gauge you should get.

(Note: Inline and tapered hook sizes vary, as the area between the thumb grip and hook differs.)

You’ll find a crochet hook size to suit the crochet projects you make. It takes a while to decide on your first set of crochet supplies, but it gets easier! Once you get your sizes sorted, I’ll help you find the best crochet hook set. There are many different types.

Crochet Hook Sizes From Popular Brands

Some brands and hook manufacturers don’t produce hooks in all sizes. Know what each craft store makes so you have the right hooks or crochet hook set.

  • Boye
  • Susan Bates


Have a question? I’ve got answers!

What Is The Most Common Crochet Hook Size?

The most common crochet hook size is an H crochet hook (a 6 in Canada and the UK and 5.00mm in metric) which is excellent for beginners. It’s used for many projects particularly with worsted weight yarn.

What Is The Best Size Crochet Hook For Beginners?

The best size crochet hook for beginners is size 5.0mm. It’s big enough to hold but not cumbersome. It also fits yarns perfectly for people learning to crochet! Regarding a recommended crochet hook type, try aluminum crochet hooks as a start. Bamboo is too grippy to work with for beginners.

When you level up in skill, try wood versions like Bamboo! You’ll be pleasantly surprised, as it’s smooth and warm to the touch. Crochet hook materials vary (metal, wood, plastic) and finding which works best with different yarns. The kind of hook and the material you love the most will take time.

The head of a hook are either inline or tapered. Try both to see which is your preference.Hooks with a rubber handle are more comfortable and ergonomic. The handles are designed to reduce hand strain. Other benefits of ergonomic crochet hooks are you can crochet for longer and your hands won’t be as tired.

Is My Crochet Hook Too Big?

If your crochet hook is too big, here’s an easy method to check if indeed it is too big for the pattern you are working on. Test your hook size by crocheting a test swatch and measuring it. A crochet pattern specifies the crochet stitches per inch.

If you don’t reach the gauge of the pattern try a different sized hook.

  • Smaller hook – it will create stitches that are tighter and more of them per inch.
  • Larger hook – it will create stitches that are looser and bigger and less of them per inch.

But you can adjust the pattern as necessary if the overall fit and shape doesn’t matter. You might want smaller stitches in scarves for winter.

Here’s a tutorial. (Check out her great range of crochet guides with helpful images and charts.)

A 2.75 mm hook Is What Letter?

A 2.75mm hook is the letter C. Also Crochet needles of this size are equivalent to a US hook size C/2.

How Does Hook Size Affect Crochet?

The smaller the hook size creates stitches with smaller yarn gaps and tighter connections between the loops. For a bigger crochet hook, the opposite is true. Crochet hook size matters. It will determine the crocheted fabric. The yarn thickness also affects the finished product.

What Happens If A Hook Has No Label?

If your hook has no label, here are ways to determine your hook size from your collection. Using a tape measure or ruler, measure the shaft and convert the Metric millimeters to US sizes.

Get a gauge or measuring tool. These have a series of different sized holes that correspond to a certain hook size. Slide the hook you use into a hole of the hook gauge tool until it fits. This will tell you what size the hook is in millimeters or US sizes.

Which Crochet Hook Is Size P?

A size P hook is 15mm. However, some brands label P types of crochet hooks as 10mm.

What Happens If I Use A Bigger Crochet Hook?

If you use a bigger crochet hook, the gauge is larger, making a bigger finished item. If you use a big hook on crochet threads, you end up with a loose creation.

What Size Is A 2.5 mm Crochet Hook?

It’s still a 2.5mm crochet hook in US sizing. In UK/Canada sizing, these types of crochet hooks are 12.

What Is A Size G Crochet Hook?

A size G crochet hook in US sizing is also known as G/6. In metric, it’s 4.00mm, and in the UK & Canada, it’s 8. Some brands like Boye label their crochet hook G as 4.25mm. Be aware that the difference in millimeters can affect your gauge.

What Is A Size 7 Crochet Hook?

A US size seven and a size 7 in the UK & Canada are the exact sizes, but 4.50mm in metric.

In US Sizes, What Is 3.00mm?

In US sizes a 3.00mm hook is a D/3 crochet hook. Some companies use D on 3.25 mm crochet hooks.

What Is A Size 8 Crochet Hook?

A size 8 crochet hook is also known as size hook H in the States, it’s a 6 in Canada and the UK and is 5.00mm in metric sizing.

What Size Crochet Hook For Blanket?

The best size crochet for a project idea like a blanket is an H/8 (5mm) size hook. However, it depends on the yarn and your fiber preference. 5/5.5mm for Sport or DK weight yarn. Using something chunkier, or want a looser look for your afghan? Use the crochet hook size 6/6.5mm.

Aluminum crochet hooks are excellent for these projects. A great company that makes aluminum hooks is Susan Bates.

What Size Crochet Hook For 4ply Wool?

The best crochet hook size for 4ply wool is 2.50mm – 3.00mm, US E/4, and 12-9 for the UK/Canada.

Does The Type Of Yarn Weight Affect Which Crochet Needles You Use?

The type of yarn weight affects whether you should use small or big crochet needles (another term for hooks). A thicker yarn requires something bigger, a fine, thin yarn requires a smaller crochet needle.


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Crochet Hook Sizes - Handy Size Chart & The Sizing Facts (5)

READ NEXT – Want info on the types of crochet hooks? See here.

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Let's dive into the information about crochet hook sizes!

Crochet Hook Sizes

Crochet hook sizes are an important aspect of crocheting. The size of the crochet hook determines the size of the stitches and the overall outcome of your project. Hook sizes are measured in millimeters (mm) and can range from as small as 2 mm to 20 mm or even larger.

Different countries use different systems to indicate crochet hook sizes. Here are some common systems:

  • United States (US) sizes: In the US, crochet hook sizes are indicated by letters of the alphabet, such as B, C, D, etc., or by numbers, such as 1, 2, 3, etc.
  • United Kingdom (UK) and Canada sizes: In the UK and Canada, crochet hook sizes are indicated by numbers.

To convert between different sizing systems, you can refer to a crochet hook conversion chart. This article includes a crochet hook conversion chart that lists the sizes in metric, US, and UK/Canada sizes.

How to Choose the Right Hook Size

Choosing the right hook size is crucial to achieving the desired outcome in your crochet projects. Here are some methods to determine the appropriate hook size:

  1. Yarn Label: The yarn label often provides information on the recommended crochet hook size to use. It may indicate both metric and US sizes, as well as the recommended gauge (the number of stitches in a 4x4 inch swatch). Following the recommended hook size mentioned on the yarn label can help you achieve the best results.

  2. Gauge Swatches: Working a gauge swatch with the recommended hook size is important to ensure that your stitches match the designer's gauge. If your swatch has more stitches in a 4-inch measurement, your project will be too small, and you may need to use a bigger hook. Conversely, if your swatch has fewer stitches in a 4-inch measurement, your project will be too big, and you may need to use a smaller hook.

  3. Crochet Patterns: Crochet patterns often include recommended hook sizes. If you are following a pattern, it is advisable to use the hook size suggested by the pattern designer. If the pattern does not specify a hook size, you can reach out to the designer for guidance.

It's important to note that there is no standard set size for crochet hooks across different brands. Hook sizes can vary slightly between manufacturers, so it's recommended to use the same hook throughout a project to maintain consistent tension and avoid running out of yarn.

Commonly Asked Questions

This article also addresses some commonly asked questions about crochet hook sizes. Here are answers to a few of them:

  • What is the most common crochet hook size? The most common crochet hook size is an H crochet hook (a 6 in Canada and the UK and 5.00mm in metric). It is often used for many projects, particularly with worsted weight yarn.

  • What is the best size crochet hook for beginners? The best size crochet hook for beginners is typically a size 5.0mm hook. It is big enough to hold comfortably but not too cumbersome. Aluminum crochet hooks are often recommended for beginners due to their smoothness and ease of use.

  • How does hook size affect crochet? The size of the crochet hook affects the size of the stitches and the overall fabric produced. Smaller hook sizes create tighter stitches, while larger hook sizes create looser stitches. The yarn thickness also plays a role in the finished product.

  • What happens if a hook has no label? If a crochet hook has no label indicating its size, you can measure the shaft of the hook using a tape measure or ruler and convert the measurement to the appropriate sizing system (either metric or US sizes). Alternatively, you can use a hook gauge tool with different-sized holes to determine the size of the hook.

These are just a few highlights from this article. If you have any specific questions or need further information, feel free to ask!

Crochet Hook Sizes - Handy Size Chart & The Sizing Facts (2024)


What are all the sizes of crochet hooks? ›

Regular Crochet Hook Sizes
US Size RangeMillimeter Range
E-43.5 mm
F-53.75 mm
G-64 mm
24 more rows

What are the letter sizes for crochet hooks? ›

Crochet hook sizes: General information
2.75 mmB/2
3.25 mmC/3
3.50 mmD/4
3.75 mmE/5
12 more rows

Is it easier to crochet with a bigger or smaller hook? ›

Benefits of a Larger Crochet Hook

Faster progress: Bigger hooks can help you complete projects more quickly since they create larger stitches. Looser stitches: Larger hooks produce looser stitches, which can be suitable for certain projects like blankets and scarves that require a more relaxed drape.

What is the most useful size crochet hook? ›

Just from general experience crocheting, designing and following other designer's patterns, it appears that the most used crochet hook size ranges from 4mm (G-6) to 5.5mm (I-9).

Is there a size 7 crochet hook? ›

Most hook sizes correspond to letters, but there are the few odd sizes out that are just on their own. The size 7 hook falls right between sizes G and H and since most yarn and hook pairings are just recommendations, we can recommend you use anywhere from a size G through I hook for this type of yarn.

How do you know what size crochet hook to use without label? ›

Eyeball Your Yarn

An old eyeball trick I was taught was to lay the yarn side by side to a few crochet hooks. The hook should be a little thicker than the yarn, but not by much. They should almost be the same thickness. This is one way to eyeball your yarn and guess which hook best matches the yarn.

What is the best crochet hook for beginners? ›

Plastic hooks, like the Lion Brand Crochet Hook Set pictured above, are the most affordable, so they're great for beginners who don't want to fully commit to a set of hooks just yet. This material is also lighter, so if your wrist is prone to pain or stress, the lighter hook will help.

Is there a conversion chart for crochet hooks? ›

A crochet hook conversion chart is a valuable tool that can be used to determine the correct hook size for a specific yarn weight. It can also be used to help convert stitches from one size to another. As a result, it is an essential tool for every crocheter.

What crochet stitch is not a yarn eater? ›

Try using a V-stitch, filet stitch, or trellis stitch instead of a basic single, double, or treble crochet. These stitches all have spacing that allow for the project to progress without using a ton of yarn.

Is it better to crochet tight or loose? ›

A tight crochet stitch is more rigid, and loose crochet drapes more fluidly. So it's better to crochet tightly for projects that need to have structure or be self supporting, and loosely for items which are going to be worn.

How do you know if crochet hook is too big? ›

If you use too large of a crochet hook, the resulting crochet fabric will be loose with very little stitch definition and large holes in the fabric. Of course, there are instances where you may want a very stiff or very loose crochet, but this is quite rare.

How much does crochet hook size matter? ›

If you are a newbie to crocheting, make sure your hook is thick enough to enable you to still see the individual stitches you are creating. Larger hook sizes result in looser stitches and a more flexible, softer fabric.

What size hook for a granny square? ›

So if your granny square blanket uses dk/sportweight/8 play yarn you would use a 4mm hook. If it is Aran /worsted/10ply then you'd use a 5mm hook Chunky/12ply then 6mm . If the stitches work up too tight for you then go up a size so 4.5mm, 5.5mm or 6.5mm.

What size is a 4.00 mm crochet hook? ›

For example, if you have a crochet hook that says 4mm, you can look at the conversion charts and know that it's also called a G/6 hook in the US or a size 8 hook in the UK.

Is there a size 12 crochet hook? ›

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.

What is a size 12 crochet hook? ›

Crochet Hook Conversion chart by The Little Wool Company
12 more rows

Is a size 8 or H crochet hook? ›

American crochet hooks go by two names: a letter and a number. For example, the crochet hook size that is most commonly used for worsted weight yarn is an 'H', which is sometimes called a 'size 8'.

Are there different size crochet hooks? ›

Each yarn will have a recommended crochet hook size to be used with it, depending on the yarn weight. The thicker the yarn, the larger the hook size you will need to use with it. For example most DK yarns recommend a 4mm hook, whereas chunky yarns use a 6-7mm hook.


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