And it depends on the pattern. I have made the tablecloths and bed spreads using the thin crochet cotton. It comes in a variety of colors now instead of just white. You can use it for doilies, snowflakes and other ornaments. It has a very delicate, lacey look when the project is completed. Baby weight yarn for baby things naturally. Sports weigh I like for cardigans and pullovers. I have made a couple of blankets out of really thick yarn but I don't recall if it had a name. It was wonderfully warm but also heavy and cumbersome to work with.