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Good Yarn

Are you overwhelmed by everything going on in the world?
You've come to the right place.
At String Theory you are making the world better one stitch at a time.
Studies show that knitting and crochet improves your physical and mental wellbeing.
We love helping you find a project that restores your inner peace.
Inner peace leads to world peace. That is no small thing, but we know that you want to do more.
You want the money you spend on your passion to create the kind of world you want to live in.
So shop at String Theory. We make it simple: everything here is good for somebody, somewhere.
Your purchase makes a world of difference here.

Preorder Now

Knitting Everyday is Good for You!

Our Box of Light might look like an advent box
full of yarn and other goodies,
but it is really a self-care countdown to 2025.

LEARN MORE
Happy Yarnsgiving to you!

Get a Tosh Hat Kit

Kit Includes:
• (1) Tosh Vintage worsted weight yarn
• (1) custom style green dellaQ Oh Snap bag
• Ravelry coupon code to download the Vintage Cowtown Classic hat pattern free

Each kit is inspired by a traditional Thanksgiving side dish, like green bean casserole, mac&cheese or pecan pie.
They're so yummy you won't even miss the bird!

get yours today

Find your perfect project

We believe that there is a perfect project for every moment in your life. Meditative projects are perfect for morning ritual or an evening in front of the tv. However, sometimes you need a challenge to motivate you or practice your concentration. Big afghans can keep you cozy while knitting in the winter. Smaller projects are perfect for traveling and waiting for kids. Take a look and see what calls your name. Let us know if you have any questions.

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  • The HNB House

    Ornament Embroidery Kit

    $18.00

    Our DIY Wood Embroidery Kit is the perfect craft project for any DIY enthusiast. The kit includes all the materials needed to create a beautiful wo...

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  • Plied Yarns

    Check the Box Kit

    $58.00

    Kit includes enough yarn to make the Check the Box cowl, the pattern Janet designed especially for the 2024 Chicago Yarn Crawl: Check the Box cowl...

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  • -

    Natural Dye Kits

    from $32.00
    from $16.00

    The Natural Dye Kit guides you through the process of mordant dyeing, the most common type of dyeing with plants. It contains the pre-measured mor...

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  • Manos del Uruguay

    Finito Scarf KIT

    $90.00

    This fingering-weight scarf uses a simple technique that looks like complex colorwork. Worked lengthwise, end to end, each row uses only one color,...

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  • Ikigai Fiber

    Gumdrop Kerchief KIT

    $75.00

    The perfect size of cozy! We used 5 skeins of Ikigai Chibi Paka to make the Gumdrop Shawl (large kerchief size). Finished Size: 55" x 16" Kit inc...

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  • -

    Koigu Paint Can

    $40.00

    A wonderful color starter pack or gift for the connoisseur of KOIGU KPPPM fine yarns. Koigu KPPPM  5x 25g skeins =125g/ 435yds total   100% merino ...

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  • Revolution KITS - String Theory Yarn Co
    Manos del Uruguay

    Revolution KITS

    $60.00

    This pattern was designed for the Chicago Yarn Crawl 2022. Every year during the Yarn Crawl, we highlight a yarn company that exemplifies who we a...

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  • Toft

    Toft Crochet Kit

    $48.00

    Each complete kit forms part of the 'Edward's Menagerie' collection of amigurumi crochet soft toys designed by Kerry Lord from TOFT. This amigurumi...

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  • Tuscaloosa Hat KIT - String Theory Yarn Co
    Ikigai Fiber

    Tuscaloosa Hat KIT

    $45.00

    This cozy hat is knitted using Chibi Paka Chunky by Ikigai Fiber. The brim as well as the hat body are simple, slipped stitch patterns that create ...

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Shop Projects

String Theory Yarn Co.

String Theory provides a conscientiously-curated selection of yarns that make a positive difference in the world.

You’ll find a wide range of organic, fair trade and eco-friendly yarns.

READ OUR STORY →

I just finished a fingerless mitten class and it was phenomenal! Liz was patient and funny and full of helpful hints. I normally cast on by " knitting" on.. she showed me how to cast on by thumb and today I did it on my own for the first time!!!

Andrea D.

Super cute yarn shop! Nice selection of yarn, lots of visible samples, and helpful staff! You can find neat crafted accessories from cool vendors, like project bags and various supplies, too. Great shop!

Elizabeth m.

Tutorials

We know stuff. Over the years we’ve helped thousands of customers work their way out all sorts of fibery dilemmas. Every once in a while we create a post or a video with our favorite tips. Take a look. You might find an answer to a question you didn’t even think to ask

  • Tips for Successfully Substituting Yarns

    Tips for Successfully Substituting Yarns

    by Meg Dedolph
    Understanding how to substitute yarns in a project successfully is a big part of crocheting and knitting. Many times, you find a project you like and discover that the yarn it was originally created with is no longer being produced. Or it’s not friendly to your budget. Or it’s not friendly to your skin. Or you’d like to use a yarn from your stash instead. 

    While people have written entire books on how yarns are constructed and how different fibers behave - even about how different kinds of sheep’s wool behaves - there are a few basic rules we like to think about when we’re giving advice.

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  • How to pick a good free pattern

    How to pick a good free pattern

    by Meg Dedolph
    We like free patterns as much as anyone else, but not if it’s going to be a frustrating project, or if we’re going to have to rewrite the pattern ourselves to correct mistakes.

    Here are some of our favorite tips for making sure the free pattern you want to use is also going to be fun to make. 

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