Habu is a Japanese yarn brand that specializes in extra fine yarns and special material combinations.
For example, we have extra fine merino that is used both for making lace knits and for knitting miniature dolls and clothes.

On the left you can search by weight, composition and needle size. Please note that some yarns can be used on various needles, the weight per meter is more important than the needle thickness. Depending on how the knit should look like (lace / transparent or tight), you choose the needle.

If you want to know more about those weights , read the blog I have devoted to it.