NZ Yarn Weight Guide: 4 Ply, DK, Aran & Chunky Explained

Updated by Direct Sewing · 8 November 2026 · NZD incl. GST. Prices and availability refresh as you browse; product pages confirm your chosen option.

NZ yarn weight conversion chart

Start with the four common weights below. The needle sizes are knitting starting points, and gauge means stitches across 10 cm in stocking stitch. A pattern’s specified stitch, needle or crochet-hook size and washed swatch take priority.

Common NZ yarn weights at a glance

NZ / Australia	UK / US terms	Knitting starting point	Shop and useful projects
4 ply	Fingering / sock; CYC 1	2.25 to 3.25 mm; 27 to 32 stitches per 10 cm	Shop 4 ply yarn. Fine garments, socks and shawls.
8 ply / DK	Double knitting / light; CYC 3	3.75 to 4.5 mm; 21 to 24 stitches per 10 cm	Shop DK yarn. Everyday garments, babywear and blankets.
10 ply, approximately	Aran / worsted / medium; CYC 4	4.5 to 5.5 mm; 16 to 20 stitches per 10 cm	Shop Aran and worsted yarn. Cables, textured garments and accessories.
12 ply, approximately	Chunky / bulky; CYC 5	5.5 to 8 mm; 12 to 15 stitches per 10 cm	Shop chunky yarn. Warm accessories and quicker large stitches.

Open the full yarn-weight chart, from lace to jumbo

Full reference: approximate names, not guaranteed substitutions

CYC category	Common NZ / AU name	UK / US name	Knitting gauge per 10 cm	Starting knitting needles
0 Lace	2 ply / lace	Lace	33 to 40 stitches	1.5 to 2.25 mm*
1 Super Fine	4 ply	Fingering / sock	27 to 32 stitches	2.25 to 3.25 mm
2 Fine	5 ply	Sport / baby	23 to 26 stitches	3.25 to 3.75 mm
3 Light	8 ply / DK	DK / light worsted	21 to 24 stitches	3.75 to 4.5 mm
4 Medium	10 ply, approximately	Worsted / Aran	16 to 20 stitches	4.5 to 5.5 mm
5 Bulky	12 to 14 ply, approximately	Chunky / bulky	12 to 15 stitches	5.5 to 8 mm
6 Super Bulky	Super chunky; ply names vary	Super bulky / roving	7 to 11 stitches	8 to 12.75 mm
7 Jumbo	Jumbo; ply names vary	Jumbo / roving	6 stitches or fewer	12.75 mm and larger

*Lace projects are often deliberately worked on larger needles for an open fabric, so their finished gauge may sit outside the standard range. All figures are starting points: the pattern and your blocked swatch take priority.

From fine stitches to cosy texture

Shop the weight your pattern needs

These four examples make the categories tangible. Choose a colour and quantity on the product page. Prices are per ball or skein, not for a complete project.

4 ply / fingering

Broadway Hand Dyed Sock

NZ$24.99

Available to order

100 g · 357 m. 75% superwash merino and 25% nylon. A colourful choice for socks and fine accessories.

Before buying: Start with the pattern; the yarn label suggests 2.25 to 3.25 mm needles. Select enough yarn in your chosen colour.

View options →

8 ply / DK

Crucci Soft Pure Wool

NZ$6.20

Available to order

50 g · 100 m. Smooth 100% machine-washable wool for everyday knitting and clear stitches.

Before buying: 4 mm and 22 stitches per 10 cm are label starting points. Check the pattern and care instructions.

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Aran / medium

Sirdar Jewelspun Aran

NZ$22.50

Available to order

200 g · 500 m. 100% acrylic with colour changes along the strand for garments and accessories.

Before buying: 5 mm and 18 stitches per 10 cm on the label. This is not the same yarn as Jewelspun With Wool Chunky.

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Chunky / bulky

Jewelspun With Wool Chunky

NZ$33.90

Available to order

200 g · 300 m. 80% acrylic and 20% wool for generous stitches and self-striping colour.

Before buying: 6.5 mm and 14 stitches per 10 cm on the label. Use a pattern written for this chunky yarn.

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What the main yarn weights mean in New Zealand

4 ply: fingering and sock weight

In New Zealand and Australia, 4 ply usually corresponds to British 4 ply and American fingering or sock weight. It commonly sits around 350 to 450 metres per 100 g and works on approximately 2.25 to 3.25 mm needles. The fine fabric suits socks, shawls, baby garments, lightweight tops and detailed colourwork.

“Sock yarn” often describes both a weight and a purpose. A classic sock yarn may be 4 ply/fingering, tightly twisted and blended with nylon for abrasion resistance. A delicate 4 ply baby merino may be the same nominal thickness but behave very differently in a heel or sole.

Browse Direct Sewing’s 4 ply yarn collection ↗

8 ply and DK: the versatile middle weight

In most modern New Zealand and Australian patterns, 8 ply and DK are treated as equivalent. The closest American term is DK or light worsted, category 3, not standard worsted. A usual starting point is 3.75 to 4.5 mm needles and 21 to 24 stitches per 10 cm, with 4 mm and about 22 stitches per 10 cm being a particularly common combination.

There is a reason 8 ply is such a New Zealand favourite. It grows faster than 4 ply without producing the bulk of Aran or chunky yarn, making it exceptionally useful for sweaters, cardigans, children’s clothing, blankets, hats, scarves, colourwork and first projects. Typical metreage is about 200 to 300 metres per 100 g, although airy fibres can provide considerably more.

Direct Sewing’s two standout 8 ply yarns

Broadway Merino DK is a smooth, soft, machine-washable 8 ply option for everyday garments and clear stitch definition. Crucci Aella offers a brushed alpaca and merino surface with a softer outline. Choose by the fabric you want, then swatch.

Broadway Merino or Crucci Aella: which 8 ply should you choose?

Substitution note: at 210 m and 200 m per 100 g respectively, Broadway Merino and Aella look close on paper. That makes them plausible candidates for many of the same 8 ply patterns, but not automatic one-for-one replacements. Aella’s halo, drape and hand-wash care can change the character of the finished project. Swatch each yarn, wash it as directed and judge the fabric as well as the stitch count.

A quick 8 ply project selector

• First sweater or beginner project: a smooth, light-coloured yarn such as Broadway Merino makes individual stitches easier to see and correct.
• Baby or child’s garment: prioritise softness and the care routine the recipient can realistically follow; a machine-washable merino is often practical.
• Luxury cardigan, scarf or shawl: Aella’s brushed alpaca-merino halo adds softness, warmth and visual depth without moving to a heavier yarn category.
• Cables, ribbing or colourwork: a smooth, rounded yarn shows crisp detail; a brushed yarn gives the same design a softer, more blended look.
• Blanket or hard-working family knit: check machine washability, abrasion, finished weight and total metreage, not only the words “8 ply”.

Browse Direct Sewing’s complete 8 ply and DK yarn collection ↗

Aran and worsted: warm, structured and not always identical

Aran is commonly treated as approximately 10 ply in New Zealand and Australia and category 4 in the US. American “worsted” frequently sits in the same broad category, but worsted can be a little lighter than Aran. Never replace one with the other based on the name alone.

Aran and worsted sit in the same broad medium category but are not automatically interchangeable. The Craft Yarn Council’s knitting starting range is 4.5 to 5.5 mm and 16 to 20 stitches per 10 cm. Metreage varies: Jewelspun Aran has 500 m per 200 g, or 250 m per 100 g. Compare the actual label rather than imposing a fixed metreage rule.

Chunky, bulky and 12 to 14 ply

British chunky and American bulky usually overlap with NZ and Australian 12 ply. Some yarns labelled 14 ply also sit near this range, while others are heavier. Ply naming is not standardised enough to settle the choice: check the actual gauge before substituting.

A common starting range is 5.5 to 8 mm needles, 12 to 15 stitches per 10 cm and roughly 100 to 160 metres per 100 g. Chunky yarn is useful for fast garments, hats, scarves, blankets, cushions and gifts where bold stitches are part of the design.

Browse Direct Sewing’s 12 ply and chunky yarn collection ↗

Choose yarn weight by project

The project can narrow the options, but fibre and construction still matter. Use this table as a shortlist before checking the pattern.

A useful next step

Turn the right yarn weight into a project

Here are two patterns written specifically for Jewelspun With Wool Chunky. The Aran version has a different thickness, so do not swap it in without redesigning the project.

Knitting pattern 10710

Sea Breeze hat & scarf

NZ$7.50

Pattern leaflet only. Yarn and tools are extra.

Available to order

The matching hat and scarf use 3 × 200 g balls of Jewelspun With Wool Chunky and 5.5 mm plus 6.5 mm straight needles.

Before buying: The listed price is for the pattern leaflet. On the product page you can choose yarn and tools separately in the project builder.

View options →

Crochet pattern 10810

Crystal crochet bag

NZ$7.50

Pattern leaflet only. Yarn and tools are extra.

Available to order

An easy bag with integrated handles, using 2 × 200 g balls of Jewelspun With Wool Chunky and a 6 mm crochet hook.

Before buying: Pattern leaflet price shown. Yarn and hook are additional selections; follow the pattern’s crochet tension.

View options →

Already have a pattern? Shop knitting needles or choose crochet hooks in its specified size. Stitch markers, a tape measure and a finishing needle help complete the project.

Do two strands of 4 ply equal 8 ply?

The metreage gives you a useful first check. If one 4 ply yarn contains 400 metres per 100 g, using two identical strands together produces a combined yarn equivalent of about 200 metres per 100 g:

400 m per 100 g ÷ 2 strands = about 200 m per 100 g held double

That lands in common DK territory. However, a very fine 4 ply held double may remain lighter than DK, while a robust 4 ply may produce something closer to light worsted. Two separate strands can also create a slightly different surface, drape and stitch definition from a purpose-spun 8 ply yarn.

How much 4 ply do you need when holding it double?

Both strands are consumed at the same time. If a pattern requires 1,000 metres of DK, you need approximately 1,000 metres of each 4 ply strand, about 2,000 metres of 4 ply in total. Do not add the metreage of two balls together and assume that total is the working length.

1. Compare the 4 ply’s metreage per 100 g with the chart.
2. Swatch with two strands on the pattern’s suggested needle size.
3. Wash or block the swatch as the finished item will be treated.
4. Measure the centre of the relaxed swatch over 10 cm.
5. Proceed only if both gauge and fabric feel are right.

Why ply count does not precisely define thickness

“Ply” can describe the actual number of smaller strands twisted together to make a yarn. Historically, those component strands were reasonably consistent, so more plies usually meant a thicker yarn. Modern yarns are constructed in many different ways: a thick yarn can be single-ply, while a fine yarn may contain numerous tiny plies.

In New Zealand and Australia, labels such as 4 ply and 8 ply have therefore become conventional weight names. They do not necessarily reveal how many physical strands are inside the yarn.

Real-world proof: four 8 ply yarns, four different fabrics

All four yarns below are sold as DK or 8 ply and sit around a 4 mm needle starting point. Even the three with similar metreage will not produce identical fabric, while lofty Purrino shows how far metres per 100 g can move without changing the ball-band gauge.

The lesson is not that metreage is unhelpful, it is extremely useful, but that no single number is sufficient. Compare all of the following:

• The yarn-weight name and international category
• Metres per 100 g, calculated from the actual ball size
• Recommended needle size and ball-band gauge
• Fibre content, twist, halo, elasticity and density
• The washed or blocked fabric produced by your own hands

How to compare metres when ball sizes differ

Convert each yarn to metres per 100 g before comparing it. This prevents a 25 g, 40 g or 50 g ball from looking less economical simply because the package is smaller.

Metres on the ball ÷ ball weight in grams × 100 = metres per 100 g

Example: Purrino contains 140 metres in a 40 g ball. The calculation is 140 ÷ 40 × 100 = 350 metres per 100 g.

Gauge matters more than the label

Gauge, also called tension, is the number of stitches and rows produced over a measured area, usually 10 cm in New Zealand patterns. It combines the yarn, needle size, stitch pattern and your individual knitting tension.

A small difference becomes large across a garment. Imagine a pattern uses 220 stitches to create a 100 cm body at 22 stitches per 10 cm. If your substitute produces 20 stitches per 10 cm, those same 220 stitches will measure approximately 110 cm before allowing for finishing or ease.

220 stitches ÷ 20 stitches × 10 cm = 110 cm

That is why changing the needle until the stitch count matches is only half the test. The matching swatch must also create fabric you would be happy to wear: not stiff, transparent, heavy, floppy or unstable.

A reliable swatch routine

1. Make the swatch larger than 10 cm so edge stitches do not distort the measurement.
2. Use the stitch pattern specified by the design; cables, lace and colourwork behave differently from stocking stitch.
3. Wash or block the swatch according to the yarn label and intended garment care.
4. Let it dry fully without stretching it to force the correct size.
5. Measure stitches and rows across the centre, then assess drape, bounce, density and recovery.

Browse knitting needles by size and style ↗

The safe yarn-substitution method

A strong substitute reproduces the pattern’s gauge and essential fabric behaviour. Work through these checks in order.

Fibre substitutions change the result

• Wool and merino usually provide elasticity, warmth and recovery, making them forgiving for fitted garments.
• Alpaca and possum blends can be exceptionally warm and light but may have more drape, halo or growth than a springy wool.
• Cotton and plant fibres are breathable and crisp but generally have less elasticity; a heavy garment may lengthen under its own weight.
• Mohair and brushed yarns fill visual space with halo, so their metreage and strand diameter can look misleading. They are often used alone at an open gauge or carried with another yarn.
• Acrylic and blended yarns vary widely. Check softness, heat sensitivity, recovery and care rather than treating all synthetics alike.

Buy by metreage, not by the number of balls

Buy by total metres or yards, not by matching the old number of balls. For example, ten original 50 g balls at 100 m each require 1,000 m. If your replacement is Broadway Merino DK at 105 m per ball, calculate 1,000 ÷ 105 = 9.52, then round up to 10 balls. That supplies 1,050 m before any extra allowance needed for a swatch, longer sleeves or changes to the design. Order the project quantity together and ask us about matching dye lots.

Lost the ball band? Use wraps per inch as a clue

Wrap yarn gently around a ruler so adjacent wraps touch without overlapping. Do not stretch or squash the strand. Count the wraps across one inch, then compare with a known yarn measured using the same method. Wraps per inch (WPI) is a clue to thickness, not a universal conversion standard.

Use WPI to choose a likely category, then make a swatch. It cannot tell you how the fibre will drape, stretch, bloom or wear.

A five-check ball-band routine

1. Weight: Find 4 ply, DK, Aran, chunky or the numbered category.
2. Gauge: Compare stitches and rows per 10 cm with the pattern.
3. Needles: Treat the printed size as the manufacturer’s starting point.
4. Metreage: Compare metres per 100 g and calculate the total project length.
5. Fibre and care: Decide whether the drape, elasticity, warmth and washing method suit the finished item.

Keep making

Turn a yarn weight into a project

Browse pattern ideas and check the needle sizes and lengths your next project needs.

Find your next knitting pattern

Explore Rowan, Sirdar and Hayfield designs and match a project to your yarn.Read the guide →

Knitting needle sizes explained

Check diameters, lengths and the role of your gauge swatch.Read the guide →

Shop yarn and knitting wool

Frequently asked questions

Is 8 ply the same as DK in New Zealand?

Usually, yes. New Zealand and Australian 8 ply generally corresponds to UK DK and US DK or light worsted, category 3. Individual yarns still vary, so compare the gauge and needle recommendation.

What size knitting needles should I use for 8 ply yarn?

Start around 4 mm for a typical 8 ply or DK yarn. Many labels and patterns sit between 3.75 and 4.5 mm, but the correct size is the one that gives you the pattern gauge and a fabric you like after washing or blocking.

What is the difference between Broadway Merino DK and Crucci Aella 8 Ply?

Broadway Merino DK is a smooth, machine-washable 100% superfine merino suited to soft everyday garments and clear stitch definition. Crucci Aella combines merino with brushed alpaca for a warmer, drapier fabric with a gentle halo and requires hand washing. Both belong to the 8 ply/DK family, but they create different-looking garments.

Is American worsted yarn the same as 8 ply?

Not usually. Standard US worsted is commonly closer to 10 ply or Aran/category 4 and is generally thicker than DK/8 ply. “Light worsted” may overlap with DK, so check the stated gauge rather than relying on the word worsted.

Are Australian and New Zealand yarn weights the same?

They are generally very similar. Both commonly use ply-based names such as 4 ply, 8 ply, 10 ply and 12 ply. Manufacturer variation still makes the ball-band gauge important.

Are 4 ply and sock yarn the same?

Many sock yarns are 4 ply/fingering weight, but “sock yarn” also suggests a yarn designed for wear, often with firm twist and nylon or another strengthening fibre. Not every soft 4 ply is suitable for hard-wearing socks, and sock yarn can occasionally be sold in heavier weights.

Do two strands of 4 ply make 8 ply?

They usually create an approximate DK/8 ply thickness. Divide the single yarn’s metres per 100 g by two for a first clue, then knit and wash a gauge swatch because the result is not automatic.

Can I substitute Aran yarn for DK?

Not as a direct swap in a fitted project. Aran is normally thicker and will produce fewer stitches per 10 cm. Simply using smaller needles may create fabric that is too stiff. Choose a closer yarn or recalculate the pattern after swatching.

Can changing needle size make any yarn match a pattern?

No. Needle size can alter gauge, but a substantially different yarn may create fabric that is too dense, loose, heavy or unstable even when the stitch count matches.

Should I buy yarn by weight or metreage?

Use the pattern’s total metreage or yardage. Ball weights and lengths vary, so buying the same number of balls can leave you short. Round the calculated requirement up to a whole ball and keep the same dye lot.

Shop yarn by weight

Reference: Craft Yarn Council Standard Yarn Weight System for category numbers, knitting needle ranges and stocking-stitch gauges. NZ, Australian and UK names are approximate regional conventions. Product examples use Direct Sewing’s current ball-band specifications. Crochet gauge and hook size are pattern-specific; the knitting ranges above are not crochet instructions.