Thread       

The most common size of thread is size 10. The higher the number the thinner the thread. Thinner sizes go down to 100. Thread is generally available down to size 30 or 40.

Some thread crochet items need to be a particular size, and therefore you need to use the size of thread recommended in the pattern. Other items such as edgings can be made in the size of thread you prefer.

It can take a while to get used to using finer thread. One way is to gradually work downward, rather than switching between a fine thread project and a heavier size. The size of thread you're currently working with comes to feel normal to you.

You may have to look around to find good quality thread, but it's worth spending a little extra money on. There are a number of differences between types of threads.

Luster means a shimmery, satiny shine. Mercerization is a chemical process done to thread, which chemically burns the fuzz off and hopefully makes it shimmer. Almost all crochet thread is mercerized.

Fuzzy thread can feel soft, but fuzz works against luster, so things made from fuzzy thread won't have a satiny shine when completed. The major problem with fuzzy thread is that it makes your finished work more likely to attract and hold dust, pet hair, and other fluff. Items made from fuzzy thread tend to get fuzzier with even gentle washing.

Better quality thread has more twist. A thread with insufficient twist can cause you to split stitches and it can separate in your finished work giving a stringy look. Thread without enough twist gets increasingly fuzzy as you stitch. Thread with a good twist stays smooth and even and retains its luster.

There are two reasons for thread to feel stiff. Some have some a sort of starch or sizing on them. Others have such an intense twist. Tightly twisted thread bends well but starchy threads bend awkwardly, making stitches look uneven. Starchy thread can also leave a residue on your hands. Some crocheters like this kind of pre-starched thread, because it saves having to starch work afterwards.

Six-cord cotton comes apart into three plies, each made up of two smaller plies twisted together in the opposite direction. They are smooth, dense, and shiny and not fuzzy. Perle cotton is meant for embroidery, but can be used for crochet. However, you should only use it only for items that don't get much wear. As it has a gentle twist, it doesn't wear well.