What is the difference between yarn and thread?

Answer 1

The difference is not only in what both of these types are made out of, but mostly in the size. Yarn is thicker than thread. Each one has it's own sizes.yarn is used to construct a fabric n thread is used to join 2 pieces of a fabric .

Answer 2

In general, thread refers to a very thin string used for sewing, while yarn is a thicker, sometimes softer, string used for knitting, crocheting, etc.

There are different weight threads, usually made from cotton, with sometimes a shiny viscose added for holiday use. Weights vary from 3 to 30 with 3 being the thickest to 30 being the thinnest. There is also tatting cotton which is the thinnest of all, if you really want to drive yourself nuts and try to crochet with it.

Thread was used a lot in the doilies and filet crochet of yesteryear. Doilies are still made, but the cotton thread is also used in scarves and bookmarks these days. I have made teddies with thread also, same pattern as worsted weight but with thread and a much tinier hook. I have seen patterns for nativities and for chapstick holders also.