Knitting needle size conversion chart

A Guide to converting needle size from Metric to UK and US sizes

Metric Sizes	UK Sizes	US Sizes
2.0 mm	14	0
2.25 mm	13	1
2.75 mm	12	2
3.0 mm	11	–
3.25 mm	10	3
3.5 mm	–	4
3.75 mm	9	5
4.0 mm	8	6
4.5 mm	7	7
5.0 mm	6	8
5.5 mm	5	9
6.0 mm	4	10
6.5 mm	3	10 1/2
7.0 mm	2	–
7.5 mm	1	–
8.0 mm	0	11
9.0 mm	00	13
10.0 mm	000	15
12.0 mm	–	17
16.0 mm	–	19
19.0 mm	–	35
25.0 mm	–	50

A rough guide to yarn weight conversions

* approximate conversions as some weights do overlap.

Super Chunky	Super Bulky
Chunky	Bulky
Aran	Aran / Worstead
DK	Worstead / Sport
4 ply / Sock	Sport / Fingering
3 ply / Sock	Baby
Lace	Lace
Cobweb	Cobweb

Crochet stitch conversions

Be sure to check if you are working from a crochet pattern that you are using the correct stitch, US and UK patterns use different names for the stitches!

US	UK
chain(ch)	chain(ch)
single crochet (sc)	double crochet (dc)
double crochet (dc)	treble (tr)
half double crochet (hdc)	half treble (htr)
triple crochet (trc)	double treble (dtr)
slip stitch (sl st)	slip stitch (sl st)