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

Metric Sizes

UK Sizes

US Sizes

2.0 mm140
2.25 mm131
2.75 mm122
3.0 mm11
3.25 mm103
3.5 mm4
3.75 mm95
4.0 mm86
4.5 mm77
5.0 mm68
5.5 mm59
6.0 mm410
6.5 mm310 1/2
7.0 mm2
7.5 mm1
8.0 mm011
9.0 mm0013
10.0 mm00015
12.0 mm17
16.0 mm19
19.0 mm35
25.0 mm50

A rough guide to yarn weight conversions

* approximate conversions as some weights do overlap.

Super ChunkySuper Bulky
AranAran / Worstead
DKWorstead / Sport
4 ply / SockSport / Fingering
3 ply / SockBaby

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!



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)