Whether you're a yarn expert with years of experience or a knitting novice, choosing the right kind of knitting needles can make a project so much easier to complete. Consult our guide to knitting needle sizes for everything you need to know about choosing the right needle every time. When buying new knitting needles or starting a new knitting project, considering the size of the needles required by the project is essential. The diameter of knitting needles determines how big your stitches are, which has an effect on the overall size of your project. On top of that, there are many different systems of measuring knittting needles, which can cause a lot of confusion, especially when using older patterns. Here's what you need to know: For more great projects like this, subscribe to our free email newsletter!