🧶 Types of Yarn: Sport, DK, Worsted, Bulky… The complete guide to choosing the right knitting yarn

Are you starting a new knitting project and the pattern recommends Sport yarn, DK, Worsted, or Bulky? Do these terms seem a little mysterious to you?

You're not alone! The different yarn categories are often a source of confusion, especially when you discover English or international patterns.

In this comprehensive guide, we explain the different types of yarn, their characteristics, their differences, and how to choose the ideal yarn for your project.

Why are there several types of yarn?

Not all yarns have the same thickness.

Some are very fine and allow you to knit delicate shawls, while others are thick and perfect for making a chunky winter sweater in a few evenings.

The category of a yarn determines, among other things:

• its thickness;
• the needles to use;
• the number of stitches obtained over 10 cm;
• the final look of the garment.

This is why it is essential to respect the type of yarn indicated in a pattern.

The main types of knitting yarn

Here are the most common yarn categories used in modern patterns.

French Category	English Name	Stitches for 10 cm	Recommended Needles	Ideal for
Laine layette	Fingering	28 to 32	2 to 3 mm	Socks, baby clothes, lace
Laine fine	Sport	24 to 26	3 to 3.5 mm	Light sweaters, children's clothing
Laine moyenne	DK (Double Knit)	22 to 24	3.5 to 4.5 mm	Sweaters, cardigans, accessories
Laine classique	Worsted / Aran	16 to 20	4.5 to 5.5 mm	Sweatshirts, hats, vests
Laine épaisse	Chunky / Bulky	12 to 15	6 to 8 mm	Oversize sweaters, blankets, cowls

Each category has its advantages depending on the project you want to knit.

Sport yarn: what is it?

Sport yarn is a fine yarn, slightly thicker than Fingering.

It offers an excellent balance between lightness, flexibility, and stitch definition.

It is particularly popular for knitting:

• mid-season sweaters;
• summer tops;
• children's clothing;
• light shawls;
• elegant accessories.

Recommended needles are generally between 3 mm and 3.5 mm.

Why choose a Sport yarn?

Sport yarn allows you to obtain a finer fabric than a DK while remaining pleasant to knit.

It also offers a beautiful drape and particularly highlights textured stitches and lace.

At Knit-sis, it is ideal for models like Coquelicot Top or our Doudou Sweater.

DK yarn: what is it?

The question "DK yarn, what is it?" comes up very often among beginner knitters.

The abbreviation DK stands for Double Knit.

It is one of the most popular yarn categories in the world.

DK yarn is slightly thicker than Sport but finer than Worsted.

It is considered the most versatile yarn.

It can be used to make:

• sweaters;
• cardigans;
• hats;
• snoods;
• children's clothing;
• accessories.

The needles used are generally between 3.5 mm and 4.5 mm.

Thanks to its balance between warmth, lightness, and knitting speed, DK is suitable for both beginners and experienced knitters.

At Knit-sis, several models use this yarn category, notably Chou Cardigan, Marguerite or Strippie.

What is the difference between Sport yarn and DK yarn?

This is probably the most frequent question.

The main difference lies in the thickness of the yarn.

Sport Yarn	DK Yarn
Finer	Thicker
Needles 3 to 3.5 mm	Needles 3.5 to 4.5 mm
Light sweaters	Versatile sweaters
Softer fabric	Slightly denser fabric

Even if they seem similar, replacing a Sport yarn with a DK (or vice versa) will change the number of stitches, the dimensions of the garment, and its drape.

This is why it is always recommended to make a swatch before replacing one yarn quality with another.

Other yarn categories

Fingering

Fingering is a very fine yarn.

It is perfect for socks, shawls, lace, and delicate projects.

Worsted or Aran

Worsted is a medium to thick yarn.

It allows you to quickly knit warm sweaters, hats, or comfortable cardigans.

At Knit-sis, the Festi Cardigan or the Elmer Cardigan are excellent examples of projects using this category.

Chunky or Bulky

Bulky is a very thick yarn.

It allows you to quickly make cozy garments, blankets, or winter accessories.

Our Splashie Sweater perfectly utilizes this thickness to create a warm and graphic garment.

How to choose the right type of yarn?

Before starting a project, always ask yourself these few questions.

Does the pattern recommend a specific category?

This is always the first criterion to respect.

Changing the type of yarn changes the final dimensions of the garment.

Which season?

For a light garment intended for spring or summer, a Sport or Fingering will often be ideal.

For winter, a DK, Worsted, or Bulky will provide more warmth.

What look are you aiming for?

A fine yarn highlights complex stitches more.

A thicker yarn allows you to knit faster and offers a plush result.

Have you made a swatch?

Even with the correct yarn category, each knitter has a different tension.

A swatch helps avoid unpleasant surprises.

What are yarn types called in other languages?

If you use international patterns, you will often encounter the English names for yarn categories. Here are the main translations.

French	English	Spanish	Dutch	Swedish	Danish	Norwegian
Laine fine	Sport	Sport	Sport	Sport	Sport	Sport
Laine moyenne	DK (Double Knit)	DK	DK	DK	DK	DK
Laine classique	Worsted	Worsted	Worsted	Worsted	Worsted	Worsted
Laine épaisse	Bulky	Bulky	Bulky	Bulky	Bulky	Bulky

English names are now used in most yarn brands and international patterns, regardless of the country.

Frequently Asked Questions

What does DK mean in yarn?

DK stands for Double Knit. It is a very versatile intermediate yarn category, ideal for sweaters, cardigans, and accessories.

What is the difference between Sport and DK?

Sport is slightly finer than DK. It produces a lighter fabric while DK offers more warmth and knits a little faster.

Can Sport yarn be replaced by DK?

Yes, but only after making a swatch. The change in thickness will alter the stitch count and the final dimensions of your project.

What is the best type of yarn for beginners?

DK is generally the most recommended. It is pleasant to knit with, forgives small mistakes more easily, and is suitable for a wide variety of projects.

In summary

Understanding the different types of yarn is an essential step to successfully complete all your knitting projects.

Sport yarn is ideal for light and refined garments.

DK yarn offers the best compromise between fineness, warmth, and versatility.

Worsted and Bulky categories are perfect for winter projects or quick knits.

At Knit-sis, each pattern precisely indicates the recommended yarn category to ensure you achieve a result faithful to the model.

Discover our patterns adapted to each type of yarn

Looking for your next project?

Explore our collection of knitting patterns and find the model perfectly suited to your favorite yarn, whether you knit with Sport, DK, Worsted, or Bulky.

This way, you can choose your yarn with confidence and get a result that is both beautiful and comfortable.