What Letter Is A 3mm Crochet Hook? – Easy Guide to Crochet Hook Sizes

If you’re new to crocheting, you might be wondering what letter is a 3mm crochet hook and when to use it. The most common crochet hook sizes are 2.5mm, 3mm, and 3.5mm, but there are other sizes available too. So, what letter is a 3mm crochet hook?

In the United States, crochet hooks are typically labeled with a letter or number. The smaller the hook, the higher the letter designation goes. For example, a size B hook is smaller than a size C hook.

Therefore, a 3mm crochet hook would be labeled as a “D” hook in the US (or a 4 mm hook would be a G).

understanding crochet hook sizes

3mm Crochet Hooks are categorized by a letter in the alphabet. It is a common size used in many crochet patterns. This hook can be used to create different types of stitches, such as chain stitch, slip stitch, and single crochet.

When crocheting with this hook, it is important to keep your tension loose so that your work does not become too tight.

H Crochet Hook in MM

Whether you’re a beginner or an experienced crocheter, understanding crochet hook sizes is important. The size of your crochet hook will determine the gauge of your stitches, as well as the overall look and feel of your finished project. In general, the thicker the yarn you’re using, the bigger the hook you’ll need.

For example, if you’re working with bulky yarn, you might use a size N (10 mm) crochet hook. On the other hand, if you’re using thread or lace-weight yarn, you might use a B (2.25 mm) or even C (2.75 mm) crochet hook. It can be helpful to think of it this way: The higher the letter on the crochet hook, the bigger the hook! Or for the UK, the smaller the number the bigger the hook.

Credit: www.alibaba.com

Crochet Hook Size Comparison Chart

Here are some common Crochet Hook Sizes and their metric equivalents, as you can see from this list, there is quite a range of sizes when it comes to crochet hooks!

And that’s not even all of them – there are even larger sizes available for special projects like rugs and afghans.

MILLIMETER SIZE (MM)	CROCHET HOOK SIZE (US)	CROCHET HOOK SIZE (UK/CA)	YARN WEIGHT
2.0 mm	—	14	Fingering/Super Fine
2.25 mm	B-1	13	Fingering/Super Fine
2.5 mm	—	12	Fingering/Super Fine
2.75 mm	C-2	—	Fingering/Super Fine
3.0 mm	—	11	Fingering/Super Fine
3.25 mm	D-3	10	Fingering/Super Fine
3.5 mm	E-4	9	Fingering/Super Fine
3.75 mm	F-5	—	Sport/Fine
4.0 mm	G-6	8	Sport/Fine
4.5 mm	7	7	DK/Light
5.0 mm	H-8	6	DK/Light
5.5 mm	I-9	5	Worsted/Medium
6.0 mm	J-10	4	Worsted/Medium
6.5 mm	K-10.5	3	Worsted/Medium
7.0 mm	—	2	Worsted/Medium
7.5 mm	—	1	Bulky
8.0 mm	L-11	0	Bulky
9.0 mm	M-13	00	Bulky
10.0 mm	N-15	000	Super Bulky
12 mm	O-16	—	Super Bulky
15.0 mm	P/Q-19	—	Super Bulky
15.75 / 16.0 mm	Q	—	Jumbo
17.5 mm	R	—	Jumbo
19.0 mm	S-35	—	Jumbo
25.0 mm	U	—	Jumbo

Conclusion

A 3mm crochet hook ranges between a C and D but will be more commonly labeled a D. A 3mm hook is best used with a Fingering/Super Fine Yarn.