Wool and yarn are often used to mean the same thing, but they're not quite interchangeable. Wool is a fibre that comes from sheep, while yarn is the spun strand you knit or crochet with, which can be made from all sorts of fibres. Understanding the difference helps you read a yarn label with confidence and choose the right material for your project. Here's what sets them apart, and why it matters when you're deciding what to make.

Let’s untangle the mystery of yarn weight and ply and make it simple, so you can choose your yarn with confidence every time.