I am getting confuseder and confuseder, when it comes to understanding what kind of thread I should use for my DIY tartan project, which would be the step previous to sourcing it. As in, what should I look for?

OK, so, tartan fabric (is saying "fabric" after "tartan" redundant?) runs anywhere 25 to 40 ends per inch, so far so good. 16oz per sq yard is considered "heavy," 10oz very light fabric or so seems to be the consensus.

I come from the Highlands. I mean, Highlands. 3,800 meters over sea level. We do heavyweight as a norm, cause we know what cold up there is like, and now in the still cool evenings of New England, I have on my knees this handmade, homespun wool throw that, after some maths, clocks at 38 oz / sq. yard.

To think that something half this would be "heavy", and we would have to go to 1/3, 1/4 for "light," somehow my brain gets confused, I just am not used at wool thread that thin. It must exist, as everybody talks about it, but, it's just that I don't have the experience. We do light fabric, but it's more like very open weave, the thread itself is rather thick, compared to what is needed for 30-ends/inch, like .5 mm?

And I have no idea on how to go about buying it in this hemisphere. (yes, I have found some distributors, but I don't know what to look for)

Having written this, I feel refreshed, I guess I can do a search for "wool thread thickness," and learn terminology... But help is still appreciated.

I intend to do homespun, with wool spinned in the Old Country if I manage it. Will have to show my people some sample of what I need... Oh, it will be a ride, might not work. But, one problem at a time. Not unlikely I might need to source it in the US. Any recommendations?

Thank you!