Understanding crochet hook sizes are one part of everything you need to know. Don’t worry. It’s simple, follow the charts below.
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?
Here are methods to decide what hook size you need.
- Yarn Label – Says what hook size to use, in metric and US sizes. (Plus more info on care, fiber content.)
- Gauge Swatches – Work the swatch with the recommended hook and stitches. Use a smaller hook if it’s too big and a bigger hook if it’s too small
- Patterns include hook sizes too. Ask the pattern designer if it doesn’t
Note: Hook sizes (in mm) vary from the different crochet hook brands. No set size for crochet hooks exists yet. This guide is for reference only.
Don’t change hooks mid-project. Because of material and manufacturer differences, use the same hook throughout.
You might run out of yarn if you use different hook sizes when using a kit.
See my post on a crochet hook stand for keeping your tools under control.
What Are All The Sizes Of Crochet Hooks?
It’s essential to know the conversions when you want to use a crochet pattern written in another 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!
(The shaft is the space between the thumb area and the hook.)
The diameter of the shaft can be converted to United States sizes. (Uses numbers and letters.) A US size G hook is 4.25mm in diameter. In the UK and Canada, they use numbers. Australia and New Zealand use metric sizes.
Choose which system works for you, whether metric or letters 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. They come in numbered sizes getting larger as the diameter or millimeters get smaller.
These crochet hooks vary in size from the 0.6 mm thickness of size 12 to the 3.25 mm thickness of size 00.
Crochet Hooks For Different Yarn Weights
Here’s how to find the right size crochet hook.
- 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) – N/15
Need a yarn weight chart? See here.
Crochet Hook Conversion Chart
Hope you find this crochet hook size chart helpful!
These are how regular crochet hooks come, and Tunisian crochet hooks.
Download A Handy PDF Of This Hook Size Chart
Crochet Thread Hook Sizes / Steel Hook Crochet Sizes
These needle sizes are for thread crochet hooks, used for thread crocheting.
Download A Handy PDF Of This Hook Size Chart
How Do You Know What Size Crochet Hook To Use?
Choosing the right-sized crochet hook follows a process.
In most crochet patterns, they have a suggested gauge with a specific crochet hook. This shows how many stitches you should have per inch.
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 your stitches. Super crucial for crocheting items such as a sweater or top.
Suppose your square is smaller than what the pattern calls for. Size up a hook. Or down one of the crochet needle sizes if your square is too large.
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. Once you get your sizes sorted I’ll help you find the best crochet hook set.
Crochet Hook Sizes From Popular Brands
Some brands don’t produce hooks in all sizes. Know what each craft store makes so you have the right hooks or crochet hook set.
What Is The Most Common Crochet Hook Size?
A G/H crochet hook (a 6 in Canada and the UK and 5.00mm in metric) is excellent for beginners. It’s also used for all sorts of projects.
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. Regarding crochet hook types, try aluminum crochet hooks as a start.
Is My Crochet Hook Too Big?
Test your hook size by crocheting a test swatch and measuring it. A pattern specifies the crochet stitches per inch.
- Smaller hook – fewer stitches
- Larger hook – more stitches
A 2.75 mm hook Is What Letter?
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, it creates stitches with smaller yarn gaps and tighter connections between the loops. For a bigger crochet hook, the opposite is true. The yarn weight also affects the finished product.
What Happens If A Hook Has No Label?
Here are ways to determine your hook size. By using a ruler, measure the shaft and convert the Metric millimeters to US sizes. Get a gauge or measuring tool. Slide the hook you use into a hole until it fits.
Which Crochet Hook Is Size P?
A size P hook is 15mm. However, some brands label P as 10mm.
What Happens If I Use A Bigger Crochet Hook?
The gauge is larger, making a bigger finished item.
What Size Is A 2.5 mm Crochet Hook?
It’s still a 2.5mm crochet hook in US sizing, as there is no direct equivalent. In UK/Canada sizing, it’s 12.
What Is A Size G Crochet Hook?
In US sizing, a size G crochet hook is also known as 6. In metric, it’s 4.00mm, and in the UK & Canada, it’s 8.
What Is A Size 7 Crochet Hook?
A US size 7 and a size 7 in the UK & Canada are the same sizes, but 4.50mm in metric.
In US Sizes, What Is 3.00mm?
A D/3 crochet hook. Some companies use D on 3.25 mm crochet hooks.
What Is A Size 8 Crochet Hook?
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 weight you’re using.
5/5.5mm for Sport or DK weight yarn. Using something chunkier? 6/6.5mm.
What Size Crochet Hook For 4ply Wool?
The best crochet hook for 4ply wool is 2.50mm – 3.00mm, US E/4, and 12-9 for the UK/Canada.
Come back to this post whenever you need to use the crochet hook sizes conversion chart. Happy crocheting!
Next > Black Friday Yarn Sale
Pin Now to Save for Later
READ NEXT – Want info on the different types of crochet hooks? See here.