Yarn substitution can feel a little daunting at first. With so many yarns to choose from, it's easy to worry about making the wrong decision. The good news is that once you know what to look for, it becomes much simpler.
A pattern is a recipe for creating a particular fabric. The designer has chosen a gauge and a yarn because together they create a specific look, feel and drape.
When suggested yarns are discontinued, unavailable in Aotearoa New Zealand or too expenny, we help makers choose a substitute yarn by looking at three key pieces of information:
- Stitches per 10 cm (gauge)
- Fibre content
- Total meterage
Together, these three details tell us far more than the name printed on the yarn band and let us know if we are on the right track with a recommendation.
Step 1. Match the gauge
Gauge is the first thing we compare. It tells you how many stitches and rows are needed to create 10 cm of fabric.
Stitch gauge is usually the most important measurement because it affects the finished size. Row gauge is still worth checking, especially for garments, but many patterns can accommodate small differences in row count.
If your substitute yarn can achieve a similar gauge while creating a fabric you like, you're well on your way to creating a garment with similar proportions.
Treat names like 4ply, Sport, DK or Worsted as a guide rather than a rule. These terms vary between countries and manufacturers, so two yarns labelled "DK" may be surprisingly different. Instead, focus on the numbers.
The Sophie Scarf by PetiteKnit calls for:
- 22 stitches × 42 rows = 10 cm in garter stitch
- 3.5 mm needles
Prosper DK is recommended at:
- 22 stitches per 10 cm
- 3.5–4 mm needles
The gauge is a comfortable match.
This is also the stage where we recommend knitting a swatch. Even when the numbers look perfect on paper, a small swatch lets you see how the fabric behaves, how it feels in your hands, and whether you enjoy knitting with it.
Step 2: Think about the fibre
Once you've found a yarn that can achieve the right gauge, think about how the fibre will influence the finished fabric.
The Sophie Scarf is designed in cashmere, chosen for its softness, warmth and light weight.
Prosper DK has a different fibre composition. It's 100% superwash merino wool, so the scarf won't feel exactly the same as intended, but that's perfectly okay. It will still create a beautiful fabric with its own character.
As you become more familiar with different fibres, you'll begin to understand how they behave. Wool offers elasticity and warmth, linen adds drape and structure, silk brings strength and sheen, while alpaca creates a light, lofty fabric with a beautiful halo. These qualities all influence how a finished project looks, feels and wears.
Step 3. Calculate the meterage
Once you've chosen a substitute yarn that creates the right fabric, it's time to work out how much you need to complete your project.
Different yarns are sold in different sizes, so don't compare the number of balls. Always compare the total number of metres required.
First, find out how many metres are required for your size of garment and compare that with the number of metres in a skein of your chosen yarn.
The small Sophie Scarf uses approximately 92 metres of yarn.
Prosper DK contains 225 metres per 100 g skein.
Next, divide the number of metres from the pattern by the number of metres in your chosen yarn. In this case: 92 ÷ 225 = 0.41
A single 100g skein of Prosper DK contains enough yarn to make two small Sophie Scarves, with a little left over.
Alternatively, you could use Prosper DK mini skeins that contain 48 metres per 20 g skein. So, in this case: 92 ÷ 44 = 2.09
Three mini 20g mini skeins of Prosper DK contain enough yarn to make one small Sophie Scarf, with a little left over.
Tip: If the pattern doesn't list the meterage, you can usually find it on Ravelry, where yarn information is standardised and easy to compare.
Step 4: Trust the process
One of the most interesting things about the Sophie Scarf pattern is that PetiteKnit recommends several different yarns. They don't all have the same meterage or fibre content, and one option is even knitted with two strands held together.
What they have in common isn't the number of metres per ball. It's the fabric they create.
That's why we begin with gauge. Once we've found a yarn that produces a similar fabric, we think about fibre, then calculate how much yarn we'll need.
Yarn substitution isn't about finding an identical yarn. It's about creating a fabric you'll love to knit and wear.
There are no hard rules, only thoughtful choices.
Still not sure?
Bring your pattern into the studio or get in touch online. We'll happily help you choose the best Prosper yarn for your project—or take a look at our ready-to-knit kits, where we've already done the matching for you.
