Rectangular Granny Square Afghan
You can use just about any yarn (within reason, I wouldn’t use fun fur) and almost any crochet hook for this pattern.
You can also use any size hook with this pattern…gauge doesnt really matter with this pattern. Just depends on what you want it to look like.
I’ve made doilies with thread, and dishcloths with crochet cotton with this pattern. You can make it as large as you want by adding rounds.