

So the bigger number hook is actually smaller. That at least makes sense – except of course for the weird fact that the bigger number thread is actually thinner. You use a bigger number hook with a bigger number thread.

On the other hand, working with a size #10 thread, you might use a US size 6, 7, or 8 thread crochet hook. Smaller crochet thread hook numbers work with thicker threads.Īs you can see from the thread crochet hooks charts we’ve attached here, if you’re working with a size #3 thread then you’ll use a US size O, 1 or 2 thread crochet hook. With thread, a bigger number means a thinner yarn. After all, smaller yarn, smaller weight number right? DK weight yarn is a #3 and that’s thinner than Bulky yarn which is a #5. This is counterintuitive, right? You would think: thinner thread, smaller number. And so on up to the thinest of the threads: #100. After that, it increases in digits of ten as it gets thicker. The thickest threads are #3, #5, #8, #10. Here are three key things to know to get you started: Crochet thread is assigned a number related to its thickness. Thread Crochet Hook Sizes Are Counterintuitive So, if you’re working with a yarn and you feel like the hook is too small for the thickness, you’ll go up in size. Thinner yarn, smaller letters and numbers thicker yarn, larger letters and numbers. Even if you don’t understand the labeling just yet, you can tell that B-E, 1-4, and 2.25 – 3.5 are all smaller than the !-K, 9-10.5, and 5.5 – 6.5 mm ranges for the thicker worsted weight yarn. If you’re working with a thinner (smaller) yarn, then you’ll use a crochet hook size that’s smaller. (We’ll cover exactly what those numbers mean momentarily.) In contrast, you’ll usually use a size range of I9 – K 10.5 (5.5 – 6.5 mm) when working with a #4 worsted weight yarn. So, for example, if you look at the aforementioned yarn weight chart, you’ll see that you’ll usually use a size range of B1 – E4 (2.25 – 3.5 mm) when working with a #1 weight super fine yarn. Typical crochet hooks used for yarn will grow in size as the yarn gets thicker. However, there’s a very important difference when it comes to sizing and crochet hooks charts. Crochet Hook Sizes Grow Bigger for Thicker Yarn In contrast, classic yarn crochet hooks are bigger and may be made of aluminum, bamboo, plastic, etc. Thread crochet hooks are smaller (obviously, because thread is thinner.) They’re usually made of steel. Now, to be clear, the hooks themselves are basically the same other than size. Yarn Crochet Hooks SizingĪs you’ll see from our crochet hooks charts here, there is an important distinction to be made when it comes to thread crochet hooks vs. Moreover, it has suggestions for the types of yarn used for each crochet hook size. However, if you’re working to get specific gauge or to use the hooks in the traditional way, then you’ll use specific sizes of crochet hooks with specific yarns.

Of course, you can use pretty much any size hook with any size yarn to achieve different effects. As you know, you’ll use different sizes of crochet hooks for different yarn weights.
