US 6 knitting needles (4 mm)
US size 6 knitting needles are 4 mm in the Craft Yarn Council chart.
On old UK and Canadian needles and patterns the same size is number 8.
They are in the recommended needle range for 3 Light yarn (DK, light worsted).
Needles around 4 mm
Needles around 4 mm| US | mm | Old UK | Yarn weights |
|---|
| 4 | 3.5 mm | — | 2 Fine |
|---|
| 5 | 3.75 mm | 9 | 2 Fine, 3 Light |
|---|
| 6 | 4 mm | 8 | 3 Light |
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| 7 | 4.5 mm | 7 | 3 Light, 4 Medium |
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| 8 | 5 mm | 6 | 4 Medium |
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Yarn weights for 4 mm needles
Yarn weights for 4 mm needles| Weight | Knit gauge | Needles |
|---|
| 3 Light | 21–24 sts per 4 in (10 cm) | 3.75–4.5 mm (US 5–7) |
|---|
The same size in crochet hooks
A 4 mm crochet hook is G-6.
Sizes from the Craft Yarn Council’s Hooks & Needles standard; old UK / Canadian numbers are the wire-gauge sizes used before metric. Go by the millimeter size printed on the needle.
Other knitting needle sizes
Frequently asked questions
What size in mm is a US 6 knitting needle?
A US 6 needle is 4 mm.
What yarn goes with 4 mm knitting needles?
They are in the recommended needle range for 3 Light yarn (DK, light worsted).
Why don’t UK and US needle numbers match?
Old UK numbers come from a wire gauge where bigger numbers are thinner; US numbers grow with the needle. Millimeters are the same everywhere.