Knitting Needle Size Chart

The reference guide you need to recognize and memorize knitting needle sizes.

You may have noticed knitting needle sizes described as a single number (US) or a millimeter value (metric). These descriptors are used by manufacturers to identify the needle size, and the sizing format can vary from pattern to pattern. Talk about confusing.

Here at B.Hooked, you’ll find single number sizes in all our patterns, but sometimes you’ll encounter only a millimeter unit used in patterns from other sources. In those cases, you’ll want to find the number equivalent before you start.

That’s where this knitting needle size chart comes in handy. Memorize it or bookmark it, whichever you choose, to familiarize yourself with both forms of needle sizes. Then use it to convert from one to the other.

Millimeter SizeUS Size
2.25 mm1
2.75 mm2
3.25 mm3
3.50 mm4
3.75 mm5
4.00 mm6
4.50 mm7
5.00 mm8
5.50 mm9
6.00 mm10
6.50 mm10.5
8 mm11
9 mm13
10 mm15
12.75 mm17
15 mm19
19 mm35
25 mm50
For more information or for additional sizes, check out the hooks and needles standards from the Craft Yarn Council.
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