Crochet Hook Sizes Chart (A Free Conversion Guide)


This blog post will include a crochet hook sizes chart and a free conversion guide.

Crochet hooks come in different sizes, and choosing the right size for your project can make a big difference in the finished result. 

The size of your hook will determine the size of your stitches and, ultimately, the size of your finished piece. 

That’s why having a crochet hook sizes chart can be incredibly helpful for any crocheter. 

Whether you are a beginner or an experienced crocheter, this guide and chart will surely come in handy for your future projects!

Get the latest in your inbox!

Weekly news, free patterns, tutorials, and more.

Crochet hook sizes chart and free conversion guide

What Is A Crochet Hook?

A crochet hook is a tool used in the craft of crocheting to create various fabric items by interlocking loops of yarn or thread. 

It typically consists of three main parts: the head, the throat, and the handle.

The head, also known as the tip or point, is the foremost part of the hook and is where the yarn is manipulated to create stitches. 

The throat is the curved or angled section that follows the head, allowing for smooth insertion and movement of the hook through loops. 

Finally, the handle provides a grip for the user, often designed ergonomically for comfortable and extended use. 

Crochet hooks come in a variety of materials, sizes, and shapes, each suited to different types of yarn and the personal preferences of the crafter.

A great choice is the Addi ergonomics crochet hook

Crochet hooks in various sizes

What types of crochet hooks are there?

There are several different types of crochet hooks, each designed with specific features to accommodate different preferences and needs:

  1. Traditional Crochet Hooks: These are the most common types of crochet hooks and are typically made of aluminum, plastic, or bamboo. They have a tapered shaft with a hook at one end and a thumb rest or grip area at the other.
  2. Steel Crochet Hooks: Steel crochet hooks are similar in design to traditional hooks. They are often used for delicate crochet work, such as lace or thread crochet. They also have a different sizing system, you can see a chart below.
  3. Ergonomic Crochet Hooks: Ergonomic crochet hooks are designed with features such as soft handles, contoured grips, or cushioned thumb rests to reduce hand fatigue and discomfort during long periods of crocheting.
  4. Tunisian Crochet Hooks: Tunisian crochet hooks, also known as afghan hooks, have an elongated shaft with a stopper at one end to prevent stitches from falling off. They are used for Tunisian crochet, a technique that combines elements of crochet and knitting.
  5. Double-Ended Crochet Hooks: Double-ended crochet hooks have a hook at both ends and are used for techniques such as Tunisian crochet in the round.
  6. Interchangeable Crochet Hooks: Interchangeable crochet hooks consist of a set of hook tips that can be attached to different lengths of cords or handles. They offer versatility and flexibility, allowing crocheters to easily customize the length and size of their hooks for various projects.
  7. Specialty Hooks: Specialty crochet hooks include unique designs for specific purposes, such as hooks with built-in lights for crocheting in low-light conditions, flexible hooks for working with unconventional materials like wire or fabric strips, or hooks with built-in counters or stitch markers.

What are the crochet hooks typically made of?

Crochet hooks are crafted from different materials to suit a variety of preferences and needs.

Common materials include aluminum. 

Aluminum hooks are known for its lightweight feel and smooth glide through yarn; steel is ideal for fine crochet work with crochet thread or lace weight yarn due to its precise hook; plastic offers affordability, lightweight, and gentle handling, making it suitable for beginners or those with hand sensitivity.

Plastic hooks are an excellent and affordable option.  

Wooden hooks made of bamboo and wood are prized for their warm, natural feel, smoothness, and comfortable grip during extended crocheting sessions. 

Additionally, ergonomic materials such as rubber, silicone, or soft plastics are used to create hooks with cushioned handles or grips designed to reduce hand strain and fatigue. 

Each hook material offers unique characteristics, allowing crocheters to choose the hooks that best suit their personal preference, budget, and project requirements.

Crochet hook sizes in different materials

Understanding Crochet Hook Size Systems: US vs Metric

The difference between the US and metric systems for crochet hook sizes stems from historical conventions and regional preferences. 

In the United States, crochet hook sizes are typically labeled with a letter and/or number designation, such as B-1, H-8, D-3, or J-10, N-13, F-5, P-15, and C-2, which corresponds to specific measurements. 

These letter and number designations are based on traditional sizing systems that have been in use for decades and are familiar to American crocheters.

On the other hand, the metric system, which is used in many countries worldwide, measures crochet hook sizes by millimeter sizing (mm). 

For example, a 3.5 mm crochet hook is commonly used for lightweight yarns, while a 6.5 mm hook is suitable for bulkier yarns. 

The metric system provides a standardized and precise measurement, making it easier for crocheters to select the appropriate hook size based on the thickness of the yarn.

While both systems indicate the size of the crochet hooks the same way, the difference in labeling can sometimes cause confusion, especially when working with patterns or materials from different countries. 

However, many crochet resources provide conversion charts to help crocheters navigate between the US and metric sizing systems, allowing for greater flexibility and accessibility in the global crochet community. 

You can see one below.

Crochet Hook Sizes Chart Metric US And OLD UK

Crochet Hook Sizes Chart – Grab Your Free Printable PDF Here…

Guide to Selecting the Right Crochet Hook Size for Each Yarn Weight

There are various standards of yarn weights (created by the Craft Yarn Council), and it is essential for the projects that you select the right yarn for your work.

Here’s a general guide to yarn weights and their corresponding recommended crochet hook sizes. 

The size of the hook depends heavily on the yarn weight; the thinner yarn, the smaller the hook, and the thicker yarn needs a bigger hook.

The correct hook size can vary depending on factors such as personal tension, desired fabric density, and specific pattern requirements. 

Additionally, always refer to the manufacturer’s recommended hook size on yarn labels for the most accurate guidance.

  1. Lace Weight (0):
    • Crochet Hook Size: Steel hook, typically ranging from 0.6 mm to 1.8 mm.
  2. Super Fine (1) / Fingering Weight:
    • Crochet Hook Size: 2.25 mm to 3.5 mm (US B-1 to E-4).
  3. Fine (2) / Sport Weight:
    • Crochet Hook Size: 3.5 mm to 4.5 mm (US E-4 to 7).
  4. Light (3) / DK Weight:
    • Crochet Hook Size: 4.5 mm to 5.5 mm (US 7 to I-9).
  5. Medium (4) / Worsted Weight:
    • Crochet Hook Size: 5.5 mm to 6.5 mm (US I-9 to K-10.5).
  6. Bulky (5) / Chunky Weight:
    • Crochet Hook Size: 6.5 mm to 9 mm (US K-10.5 to M-13).
  7. Super Bulky (6) / Super Chunky Weight:
    • Crochet Hook Size: 9 mm and 15 mm (US M-13 to P/Q).
  8. Jumbo (7) / Jumbo Weight:
    • Crochet Hook Size: 15 mm and larger. (US P/Q to Larger).
Crochet Hook Sizes For Yarn Weights Metric OLD UK and US

How to find the right hook size for your project? 

Finding the right crochet hook size for your crochet project is essential for achieving the correct tension and gauge.

Start by referring to the yarn label, which often recommends a specific hook size. 

If not, you can use a crochet hook size recommended in the pattern you’re following. 

For best results, it’s a good idea to crochet a small gauge swatch using different hook sizes until you achieve the desired fabric density and drape. 

Remember that everyone’s tension varies, so what works for one person might not work for another. 

Don’t hesitate to experiment with different hook sizes until you find the perfect match for your project.

Wooden crochet hooks

Most Common Hook Sizes

Hooks come in a range of sizes, the most commonly used crochet hook sizes vary depending on the region and the type of projects being undertaken. 

However, some sizes are more universally popular.

In the United States, sizes G (4.0 mm), H (5.0 mm), and I (5.5 mm) are among the most commonly used for general crochet projects.

In the UK, sizes 4 mm, 4.5 mm, and 5 mm are frequently used. 

These sizes are versatile and suitable for a wide range of yarn weights and project types, making them popular choices for both beginners and experienced crocheters alike. 

Additionally, larger hook sizes, such as N (10.0 mm) and P (11.5 mm), are often used for bulky yarns and projects where a looser, more open stitch is desired, while smaller sizes like E (3.5 mm) and F (3.75 mm) are favored for finer yarns and intricate stitch work.

Crochet hooks

How to hold a crochet hook?

There are several common ways to hold a crochet hook, and the best method often depends on personal comfort and preference. 

One popular technique is the “knife hold,” where you hold the hook much like you would hold a knife when cutting food. 

Grip the handle firmly between your thumb and index finger, with your other fingers supporting the handle for stability. 

Another common method is the “pencil hold,” resembling how you hold a pencil when writing. 

Hold the hook between your thumb and index finger, but this time with a lighter grip, allowing for more fluid movement. 

Experiment with different grips to find what feels most comfortable for you, keeping in mind that relaxation and flexibility in your hand and wrist are key to preventing strain during long crochet sessions.

Learn everything about how to hold your crochet hook here – How To Hold A Crochet Hook 

What happens if you crochet with the wrong size hook? 

Crocheting with the wrong size hook can significantly alter the outcome of your project. 

Using a smaller hook than recommended will produce tighter stitches, resulting in a smaller finished product, while a larger hook will create looser stitches and a larger item. 

This mismatch can affect the project’s size, texture, and overall appearance. Additionally, the tension and gauge may deviate from the pattern, potentially leading to a project that doesn’t fit properly or looks uneven. 

Furthermore, the amount of yarn needed and the fabric’s durability can be impacted. 

Is it better to use a crochet hook that’s too big or too small?

Whether it’s better to use a crochet hook that’s too big or too small depends on your specific project and preferences. 

If you use a hook that’s too small for the yarn weight or pattern, your stitches will be tight, resulting in a denser fabric with less drape. 

This can be beneficial for projects where durability and structure are important, such as amigurumi or items that require stiffness, like coasters or baskets. 

Conversely, using a hook that’s too large will create looser stitches, resulting in a fabric with more drape and softer texture. 

This can be advantageous for projects like scarves, shawls, or blankets, where a more fluid and open fabric is desired. 

However, both scenarios can also lead to issues such as incorrect sizing, irregular tension, or excessive yarn consumption. 

Ultimately, it’s essential to consider the desired outcome of your project and choose the hook size that best achieves that goal while ensuring to maintain gauge and tension as closely as possible.

Crochet Lessons

If you are a new maker and need help with the crochet basics, check out the crochet lessons here – Crochet Lessons {With Video Tutorials}.

There, you will find tutorial posts for all the crochet techniques a newbie needs to know and a full video tutorial to help you along.  

Including how to make a slip knot how to create a crochet chain (ch), how to crochet the basic crochet stitches, single crochet stitches (sc), double crochet stitches (dc), and all the crochet abbreviations (in UK and US terms) a maker needs to know.  

And if you need more video tutorials, check out my YouTube channel here – Handy Little Me – YouTube

For extra help, stop over to the Handylittleme Facebook Group.

You can also find us on Instagram and Pinterest.

Leave a Reply

Your email address will not be published. Required fields are marked *