Knitting terminology

Standard Yarn Weights

Name Ply (UK, NZ, AU) Wraps per inch Knit gauge (4 in / 10 cm) Crochet gauge Yarnstandards.com
Thread 0 : Lace
Cobweb 1 ply 0 : Lace
Lace 2 ply 32-34 stitches 0 : Lace
Light Fingering 3 ply 32 stitches 0 : Lace
Fingering 4 ply 14 wpi 28 stitches 1 : Super Fine
Sport 5 ply 12 wpi 24-26 stitches 2 : Fine
DK 8 ply 11 wpi 22 stitches 3 : Light
Worsted 10 ply 9 wpi 20 stitches 4 : Medium
Aran 10 ply 8 wpi 18 stitches 4 : Medium
Bulky 12 ply 7 wpi 14-15 stitches 5 : Bulky
Super Bulky 5-6 wpi 8-12 stitches 6 : Super Bulky

Source: Ravelry

Needle sizes

US UK US / UK Metric European Metric Older US system
8/0 24 .5 mm .5 mm
6/0 22 .75 mm .75 mm
20 .875 mm
5/0 19 1.0 mm 1.0 mm 18 (steel dpn)
1.125 mm 17 (steel dpn)
4/0 18 1.25 mm 1.25 mm 16 (steel dpn)
0 17 1.5 mm 1.5 mm 15 (steel dpn)
16 1.625 mm
0 15 1.75 mm 1.75 mm 14 (steel dpn)
0 14 2 mm 2 mm 0 (standard needles) 13 (steel dpn)
1 2.25 mm 2.25 mm 12 (steel dpn)
1 13 2.5 mm 2.5 mm 1 (standard needles)
2 12 2.75 mm 2.75 mm 2 (standard needles) 11 (steel dpn)
2 11 3 mm 3 mm 3 (standard needles) 10 (steel dpn)
3 10 3.25 mm 3.5 mm
4 3.5 mm 3.5 mm 4 (standard needles) 9 (steel dpn)
5 9 3.75 mm 3.75 mm 5 (standard needles) 8 (steel dpn)
6 8 4 mm 4 mm
4.25 mm 4.25 mm 6 (standard needles)
7 7 4.5 mm 4.5 mm
4.75 mm 4.75 mm 7 (standard needles)
8 6 5 mm 5 mm 8 (standard needles)
5.25 mm 5.25 mm 9 (standard needles)
9 5 5.5 mm 5.5 mm
5.75 mm 5.75 mm 10 (standard needles)
10 4 6 mm 6 mm
10 1/2 3 6.5 mm 6.5 mm 10 1/2 (standard needles)
2 7 mm 7 mm
1 7.5 mm 7.5 mm
11 0 8 mm 8 mm
13 0 9 mm 9 mm
15 0 10 mm 10 mm
17 12.5 mm
18 14 mm
19 15.5 mm
35 19 mm
50 25 mm

Source: Cyberseams

UK knitting abbreviations

 0 No stitches, times or rows • pm  place marker  No stitches times or rows for that size • p2tog purl two stitches together • alt alternate • prev previous • approx approximately • psso pass slipped stitch over • beg beginning • pwise purlwise • bet between • rem remaining • circ circular needles • rep repeat • cm centimetres • rev st st reverse stocking stitch • cn cable needle • rs right side • cont continue • skpo slip 1, knit 1, pass slipped stitch over • dec decrease • sl 1 slip one stitch • dpn double pointed needles • ssp one by one, slip the next two stitches knitwise. Put your left needle through the front loops of both slipped stitches and knit them together. • foll following • st(s)stitch(es) • inc increase • st st Right side knit, wrong side purl • k knit • tbl through back loop  • kfb knit into front and back of next stitch • ws wrong side • k2tog knit two together • wyib with yarn in back • kwise knitwise • wyif with yarn in front • lp loop • yb yarn back • m1 make one stitch by picking up the horizontal loopbefore the next stitch and knitting into the back of it • yf yarn forward • m1p make one stitch by picking up the horizontal loopbefore the next stitch and purling into the back of it • yon yarn over needle, (between a purl and a knit stitch) • meas measure • yrn yarn round needle (between purls sts and betwen a knit and a purl stitch • mm milimetres * repeat the instructions between tha asterisks as often as instructed • N1(2,3) Needle 1(2,3) •  ( ) work instructions insde the brackets as many times as instructed • p purl

Source: Wendy Poole

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