Yarn Weight Chart and Guide for Knitters and Crocheters
Wondering what yarn and needles or hook to use for what project? This is your complete guide for beginners, with a yarn weight chart!
Standing in the yarn aisle staring at colorful skeins and wondering why they can’t just label everything “thin,” “medium,” and “thick”? You’re not alone.
The world of yarn weights can feel surprisingly complicated when you’re first getting started. Between mysterious symbols on the yarn label, different hook sizes, gauge requirements, plies, and abbreviations, it sometimes feels like you need a translator just to buy supplies.
The good news? Once you understand the yarn weight system, everything becomes much easier.
Whether you’re into knitting, crochet, weaving, or all three, yarn weights affect the size of your stitches, your tension, the drape of your fabric, and the finished size of blankets, sweaters, scarves, and more. Use the wrong yarn weight category and your project may turn out much larger or smaller than expected.
I’ve been knitting since I was 15 years old . . . that would be about 34 years as of this writing. My mother taught me how to cast on, and how to knit, and I taught myself everything else. And the rest is history!
Even though I’ve been knitting for decades, and I still refer to yarn charts regularly. Even experienced yarn crafters don’t memorize every hook/needle size and weight category. That’s why having a handy reference guide is so helpful.
This guide will explain all of it, including common project uses, and how to identify mystery skeins when the label has disappeared.
What Is the Yarn Weight System?
Despite the name, yarn weight doesn’t refer to how much a ball of yarn weighs on a scale.
The yarn weight system refers to the thickness or diameter of the yarn. Thicker yarns create larger stitches and work up quickly, while thinner yarns create finer details and lightweight fabrics.
The standard system includes categories ranging from lace to jumbo. Each yarn weight category has recommended hook sizes, needle size ranges, and common project types.
Why Yarn Weights Matter
Yarn weights influence almost every part of knitting and crochet. The weight you choose affects:
- The size of your stitches
- Overall tension
- Fabric drape
- Finished measurements
- Recommended crochet hook size
- Recommended needles
- How much yarn you’ll need
This is especially important for projects like sweaters, afghans, hats, and socks where size matters.
Yarn Weight Chart
Here’s a quick-reference yarn weight chart. Bookmark it, pin it, print it, tattoo it on your forehead (kidding). This chart covers the most common yarn weight categories along with suggested hooks, needles, and project types.
*This chart is a guideline only and reflects the most commonly used gauges and hook sizes for specific yarn categories.
** Lace weight yarns are usually knitted or crocheted on larger needles and hooks to create lacy, openwork patterns. Accordingly, a gauge range is difficult to determine. Always follow the gauge stated in your pattern.
Note: Steel crochet hooks are sized differently from regular hooks — the higher the number, the smaller the hook, which is the reverse of regular hook sizing.
Now, here’s a detailed description of each type of yarn and the weight, as well as a visual so you can see an example of what that yarn looks like in a skein.
Lace
Lace weight yarns are the thinnest yarns available. These delicate threads are commonly used for shawls, lace projects, lightweight wraps, and decorative accessories.
Because lace weight yarns are so fine, they typically use smaller hooks and needles measured in mm.
Super Fine (Fingering or Sock)
This yarn weight category is often called sock yarn because it’s commonly used to make every type of sock imaginable.
Super fine yarn is also popular for lightweight garments, baby items, and detailed knitting projects.
Fine (Sport Weight)
Sport weight yarn creates lightweight fabrics without feeling overly delicate. It’s a popular choice for baby throws, lightweight sweaters, and garments.
Light (DK Yarn)
DK yarn stands for double knit yarn. This versatile yarn weight category is a favorite among knitters because it works well for sweaters, scarves, hats, and accessories.
Many crafters consider DK yarn the perfect balance between lightweight and practical.
Medium (Worsted Weight Yarn)
Worsted weight yarn is one of the most popular yarn weights available.
This versatile category is used for blankets, Christmas stockings, scarves, hats, and countless beginner projects. In some regions, worsted weight yarn is closely related to aran yarn.
If you’re unsure where to start, worsted weight is usually a safe choice.
Bulky
Bulky yarns are ideal when you want fast results. They create larger stitches and work up quickly.
Bulky is often used for cozy afghans, oversized sweaters, scarves, and even rugs.
Super Bulky
If you want to make a fun, fast, and chunky blanket or are trying to add some artistic flair to a simple sweater, then super bulky is your yarn! The gauging is 2 knit stitches in an inch!
Jumbo
Jumbo yarn is the thickest size of yarn. It’s commonly used for giant blankets, chunky home decor, statement projects, and oversized rugs.
Understanding Plies
One of the most common sources of confusion is the difference between plies and yarn weight.
Plies refer to the number of strands twisted together to create the finished yarn. Some yarns have two plies while others may have four, six, or more.
While plies can affect the appearance and texture of yarn, plies alone do not determine yarn weight. Two yarns with the same number of plies can belong to completely different weight categories.
Understanding plies helps when comparing skeins, evaluating durability, and choosing yarn for different projects.
Recommended Hook Sizes and Needle Sizes
Most yarn labels include suggestions for both crochet hook size and needle size.
These are measured in mm and serve as helpful starting points.
Remember that hook and needle recommendations are simply guidelines. Your personal tension may require adjustments.
Some projects benefit from larger hooks, while others require smaller hooks to create tighter stitches.
What Is a Gauge Swatch?
A gauge swatch is a small sample piece used to measure your stitches before starting a project. Creating a swatch helps ensure that your tension matches the pattern designer’s expectations.
If your stitches are too tight, you may need a larger hook or needles. If your stitches are too loose, you may need a smaller hook or needles.
Making a swatch is especially important when for clothing and other fitted garments.
How to Tell Yarn Weight Without a Label
Found mystery skeins in your stash? Don’t worry. There are a few easy ways to identify yarn weights without a label.
Use the WPI Method
WPI stands for wraps per inch.
To measure WPI, grab a ruler and a pencil. Wrap the yarn around the pencil so the strands sit side-by-side without overlapping.
Count the number of wraps that fit within one inch of the ruler. This number represents your WPI measurement.
WPI is one of the most useful tools for identifying yarn weights because every weight category falls within a typical WPI range.
Because measurements can vary slightly based on tension, it’s smart to measure WPI in several locations. Comparing multiple WPI measurements produces more accurate results.
Many knitters and weavers use WPI regularly when evaluating unknown skeins.
Create a Gauge Swatch
Another option is creating a swatch. By making a small sample and measuring your stitches with a ruler, you can compare the results against standard yarn weight charts.
This swatch often provides more practical information than WPI alone because it shows how the yarn behaves during actual knitting or crochet.
If you’re new to knitting or crochet, don’t overthink yarn weights.
Start by following the suggestions listed on the yarn label and pattern. Over time, you’ll develop a better understanding of yarn weights, WPI, plies, tension, hook sizes, and needle size adjustments.
Before long, you’ll be comparing skeins, choosing the perfect crochet hook size, and confidently selecting yarn for blankets, hats, socks, rugs, and every project in between.
Ready to try some projects? Now that you’ve got a chart, you’ll be able to pick your favorite yarn to try these:
Your breakdown of yarn weights is incredibly helpful! As someone just starting out in the world of knitting, I often find myself overwhelmed by all the options. Your article has provided much-needed clarity. Thank you!
I really really really hate the fact that when you google this you get these results. I’m so confused as to how yarn weight work and I keep getting these standards instead of how commercial yarn is used with cones and their weight. I don’t know anyone that uses 0-8 as a standard in the industry.
You’ll need to search more specifically. This is for regular consumers and not commercial yarn and cones.
Can you show how to make Socks using Loom ?
I am a beginner to yarn crafts.
Thank you in advance.
God Bless
Is it possible to purchase, download or copy a “yarn weight symbol and category names”
Chart?
@SUSAN, You could try to copy their chart onto a document and print it out. Its a nice chart with lots of info!