How to Read a Yarn Label: What Every Number and Symbol Actually Means

A yarn label only tells you five things that actually matter: what the yarn is made of, how thick it is, how much of it you are getting, what hook size to use, and how to wash it. Everything else on that little paper band is branding. Once you know where those five pieces of information live, you can pick up any ball of yarn in any shop and know within about ten seconds whether it will work for your project.

Here is how to decode all of it, in plain language.

1. Fiber content: what the yarn is made of

This is usually printed as a percentage, like "100% acrylic" or "68% cotton, 32% nylon". It is the single most important line on the label because fiber decides how your finished piece will feel, hold its shape, and survive being loved.

• Cotton is firm, has almost no stretch, and shows stitch definition beautifully. Great for amigurumi, where you want crisp, visible stitches and a shape that holds.
• Acrylic is soft, cheap, and forgiving. It stretches a little, which can hide small mistakes but also means shapes soften over time.
• Wool is warm and elastic. Lovely for wearables, but it can felt in the wash and is often too fuzzy for detailed amigurumi faces.
• Blends combine the best of two worlds. A cotton and nylon blend, for example, keeps cotton's crisp stitch definition while the nylon adds smoothness and durability so the yarn does not split as you work.

If you are making stuffed characters, look for something firm with good stitch definition. Our full breakdown of the tradeoffs lives in Best Yarn for Amigurumi: A Complete Guide.

2. Yarn weight: the number in the little yarn skein symbol

"Weight" here does not mean how heavy the ball is. It means how thick the strand is. Most labels show a tiny yarn-skein icon with a number from 0 to 7 inside it:

1. 0 Lace and 1 Super Fine: thread-thin, used for doilies and fine socks
2. 2 Fine and 3 Light: sport and DK weights
3. 4 Medium: worsted or aran weight, the most common beginner choice
4. 5 Bulky, 6 Super Bulky, 7 Jumbo: chunky yarns that work up fast

If a pattern says "worsted weight" and the label says 4, you are matching correctly. Some labels skip the number and print a millimetre thickness instead, which tells you the same thing in a different way.

3. Ball size: grams and metres

You will usually see two numbers, something like "50g / 120m". The grams tell you how much yarn is in the ball by mass. The metres (or yards) tell you how far that yarn actually stretches, which is what you really need when a pattern says how much yarn a project requires.

Two balls can both weigh 50g and contain wildly different lengths, because a thicker yarn uses up its 50g faster. Always compare metres, not grams, when you are checking whether you have enough.

4. Recommended hook size (and why amigurumi breaks the rule)

The label suggests a hook size, usually shown as a little hook icon with a millimetre number beside it. That recommendation is calibrated for flat fabric like scarves and blankets, where you want a soft, drapey result.

For amigurumi, deliberately go one size smaller than the label suggests. A tighter fabric means the stuffing will not peek through the gaps between stitches, and your character will hold its shape instead of going floppy. This is the single most common piece of advice new amigurumi makers wish they had heard sooner. If hook sizing still feels murky, start with What Hook Size Should Beginners Use?

5. Care symbols and the dye lot

The row of small icons near the bottom is laundry instructions. A tub means washable (a number inside is the maximum temperature in Celsius), a tub with a hand means hand wash only, and a crossed-out tub means do not wash at all. A triangle covers bleaching, a square covers drying, and an iron shape covers, unsurprisingly, ironing. A cross through any symbol means do not do that thing.

The other number worth noticing is the dye lot, a batch code printed near the colour name. Two balls of the same colour from different dye lots can be very slightly different shades, which is invisible in the shop and painfully obvious halfway up a finished piece. If your project needs more than one ball of a colour, buy them together and check the dye lots match.

A real example: what Yon Yarn's specs say

Putting it all together with our own yarn, Yon Yarn is 68% cotton and 32% nylon, comes in a 50g ball, and sits at 4 to 5 mm thickness, which puts it in the worsted range. Read that back through the five points above and it tells you a lot: the cotton majority means crisp, defined stitches that hold a shape, the nylon means it is smooth and does not split while you work, and the worsted thickness means it pairs with the kind of hook most beginner patterns assume. It comes in 26 colours, so if you need two balls of the same shade, grab them in the same order.

The ten-second label check

Next time you are standing in a yarn aisle, run this: fiber (will it hold its shape?), weight number (does it match my pattern?), metres (do I have enough?), hook size (go one down for amigurumi), dye lot (do my balls match?). That is the whole label.

If you would rather skip the decision entirely, every Yon Crochet beginner kit comes with the right yarn, the right hook, and a step-by-step video lesson already matched to each other, so there is no guesswork on your first project. Every lesson for our original beginner characters also comes in a mirrored left-hand mode. You can browse them all on our Lessons page, and if you have a question we have not answered here, our FAQ is a good next stop. Once your project is finished, How to Care for and Clean Your Amigurumi will help you keep it looking new.