Skip to content

10¢ shipping for orders over $100.

Our Story
Contact Us

String Theory Yarn Co

New
YARN
Tools
Crochet Tools
PROJECTS
Beginners
Classes & Events
Blog
Sustainable Goods

Search
Login
Cart

New
PROJECTS
Beginners
Classes & Events
Blog
Sustainable Goods

Account

Shop by Weight

Lace
Sock/Fingering
Sport
DK
Worsted
Chunky/Bulky

Shop our Favorites

Handspun Hope
Laneras
Manos del Uruguay
Mitchell Wool
Neighborhood Fiber Co
Plied
Sister Ananse
Wooldreamers

Shop by Fiber

Cotton
Wool
Alpaca
Cashmere

Ethical Yarn

NOTIONS
BAGS
BOOKS
NEEDLES
CROCHET

Crochet Tools

Cart

Your cart is empty

Continue shopping

Search for...

Home
Cesium Yarn

Cesium Yarn

This collection is empty

Continue shopping

Free in-store pickup available

10¢ shipping on orders over $100

About

Located in the Chicago Suburbs
477 N. Main St.
Glen Ellyn, IL 60137
630-469-6085

Hours: Tues - Sat 10-5

Shop

New
Yarn
Kits
Gifts
Beginners
Classes & Events

Learn

Tutorials
Project Ideas
What's New
Yarn Stories
Free Patterns

Info

Our Story
Contact Us
FAQ
Accessibility
Shipping Policy
Refund Policy
Jobs

Letters from string theory

We write like we talk, with a lot of love for good yarn and the people who make it. Yarn stories, pattern recommendations, and what’s moved us lately.
Join the 11,000 makers — from the Chicago area across the country — who open our emails.

E-mail

No noise. No selling your inbox.
Just good thoughts about making and the world.

Terms of Service | Privacy Policy

© 2026 - String Theory Yarn Co - Site by Aeolidia