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October 07, 2022
Can't find the exact yarn that your pattern recommends? Don't worry! Using good yarn alternatives will still give you successful results. Our guide to yarn substitution helps you figure out what to use for your next knitting project.
New knitters often feel the need to buy the exact yarn that a pattern recommends - but as you get more experienced, you'll realise that there are many reasons why you might seek out yarn substitutes instead. Sometimes it could be for a simple, practical reason: the pattern recommends a yarn that is only available in certain countries, has been discontinued, or is just too expensive. Other times a knitter might want to choose a yarn substitute because of allergies, ethical concerns (such as veganism), or just personal preferences. Some knitters find they can't match the pattern's gauge and have to choose a heavier or lighter yarn instead.
The question of how to substitute yarn can be confusing at first. There are a number of things to consider. From a practical, knitting point of view, start by thinking about weight. The most common yarn substitutions involve replacing one yarn for another of the same weight - for example, if the pattern calls for a DK yarn, substituting it with another DK yarn. Choosing a heavier yarn, such as Aran, or a lighter one, such as sport, will change the tension of your knitting, and could result in a piece that doesn't fit well.
If you want your yarn substitution to be close to the pattern's yarn, you'll need to pay attention to weight and fibre. Luckily, this information is all easily available on Ravelry. Here you'll find an overview of pretty much every yarn on the market today. This can help you create your own yarn substitution chart for UK knitters.
Substituting yarn weights is a little more complicated, and may involve some trial and error to get the desired result. Some knitters substitute yarns of a different weight to change the size of their finished item.
It's far easier to substitute a different yarn weight if you're making something like a scarf or a shawl, where the finished measurements aren't so important. Making something that has to fit - a jumper, hat, or socks, for example - is more difficult.
Substituting a lighter weight of yarn without changing the needle size will create a looser fabric. The holes in the stitches will be larger, and the fabric will drape more. Take a scarf pattern, for example: knit in a thick yarn, it will be cosy and suitable for winter. The same pattern in a lighter yarn will be airy and drapey, and may be better for milder weather.
If you want to use a lighter weight of yarn to knit a smaller version of the pattern, you'll also need to change knitting needle or crochet hook size. Be sure to make a gauge swatch before you start. You will need more metres of yarn when working with a lighter weight. Take a look at our yarn requirement guide to give you an idea.
Substituting a yarn with a heavier weight will create a thicker, denser fabric. It will feel more solid, and won't have as much drape.
You can use a heavier yarn and bigger needles to make a larger size version of the pattern. Just like if you're substituting a lighter weight yarn, it's essential to make a gauge swatch before you start.
It's possible to substitute multiple strands of finer yarn for a single strand of a heavier yarn. For example, holding two strands of 4-ply yarn will give you the same weight as DK. You can find more information by looking at a yarn weight substitution chart. Some knitters use multiple strands so they can create unique effects with variegated colours of yarn. It's also an interesting way to play with different fibres. For example, holding a strand of mohair with merino gives you mohair's trademark fuzzy halo, along with the strength and softness of merino.
Alternatively, you might have a pattern that calls for multiple strands of yarn, and you'd prefer to use a single strand. Either way, be sure to start with a gauge swatch so you can get a good idea of what your project will look and feel like.
There are many reasons why knitters choose to substitute a different fibre: allergies, ethical concerns like veganism, ease of washing, and more. You might also want to create a different look for your piece, or to make it warmer or cooler.
Think carefully when choosing a new type of yarn. For example, cotton has a beautiful drape, but does not hold its shape well, and stretches easily, so it may not work as a wool substitute. Some yarns, such as mohair and alpaca, have a distinctive halo effect, which will be lost if substituted. This will affect the appearance of your finished piece. Most sock yarn is a superwash blend of wool or merino and nylon; if replaced with pure wool, it is likely to felt or tear at the heels and toes.
In general, animal fibres are grippier than plant fibres or synthetic fibres. Only animal fibres can be felted, and techniques such as steeking - which require the fibres to cling to each other - are very difficult with plant-based or synthetic yarns.
Substituting yarn can be tricky at first. If you're just starting out, only substitute one similar yarn for another, until you're more confident in your choices. Check out the extensive Yarn Worx range and you'll always find the right yarn for the job!
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