We’ve upgraded our systems

Canada Post Strike Update - As of Dec. 19 2024 shipping through Canada Post will resume. All orders placed now will be shipped by us within 3 business days. Shipments will be delayed as Canada Post works to catch up after the strike.

Free Shipping

Free Delivery on Canadian orders over $100

Sew along with us

Follow fully photographed tutorials for each of our patterns

We’ve upgraded our systems to make your patterns easier to re-download. Here is how you can access your PDF pattern library:

Create an account here
On your account page, click on “Your PDF Pattern Library”
If any of your past purchases are missing from your account, don’t worry! Just email us info@threadtheory.ca and we would love to help you!

Get inspired by the Thread Theory Community #threadtheorydesigns

Learn to use our digital patterns

Let our sew-alongs guide you

We're happy to help while you sew. Message us!

Go ahead and create something exceptional

We are a small team of sewists who strive to create menswear, workwear, and androgynous patterns. We love practicality and function. We want your projects to satisfyingly challenge you and we want the results to last a lifetime. Our sewing patterns and curated haberdashery will accompany you while you create something exceptional!